DevTools: Convert Security Panel to Sentence case

Replace use of Title Case in the Developer Tools' Security Panel to use sentence case, matching Chrome text standards.

BUG=721176

Review-Url: https://codereview.chromium.org/2881513003
Cr-Commit-Position: refs/heads/master@{#473435}

components/security_state/content/content_utils.cc

@@ -306,8 +306,9 @@ blink::WebSecurityStyle GetSecurityStyle(
   if (security_info.pkp_bypassed) {
     security_style_explanations->info_explanations.push_back(
         content::SecurityStyleExplanation(
-            "Public-Key Pinning Bypassed",
-            "Public-key pinning was bypassed by a local root certificate."));
+            l10n_util::GetStringUTF8(IDS_PRIVATE_KEY_PINNING_BYPASSED),
+            l10n_util::GetStringUTF8(
+                IDS_PRIVATE_KEY_PINNING_BYPASSED_DESCRIPTION)));
   }
 
   return security_style;

components/security_state/content/content_utils_unittest.cc

@@ -181,7 +181,7 @@ TEST(SecurityStateContentUtilsTest, ConnectionExplanation) {
     GetSecurityStyle(security_info, &explanations);
     content::SecurityStyleExplanation explanation;
     ASSERT_TRUE(FindSecurityStyleExplanation(
-        explanations.secure_explanations, "Secure Connection", &explanation));
+        explanations.secure_explanations, "Secure connection", &explanation));
     EXPECT_EQ(
         "The connection to this site is encrypted and authenticated using a "
         "strong protocol (TLS 1.2), a strong key exchange (ECDHE_RSA with "
@@ -197,7 +197,7 @@ TEST(SecurityStateContentUtilsTest, ConnectionExplanation) {
     GetSecurityStyle(security_info, &explanations);
     content::SecurityStyleExplanation explanation;
     ASSERT_TRUE(FindSecurityStyleExplanation(
-        explanations.secure_explanations, "Secure Connection", &explanation));
+        explanations.secure_explanations, "Secure connection", &explanation));
     EXPECT_EQ(
         "The connection to this site is encrypted and authenticated using a "
         "strong protocol (TLS 1.2), a strong key exchange (ECDHE_RSA), and a "
@@ -216,7 +216,7 @@ TEST(SecurityStateContentUtilsTest, ConnectionExplanation) {
     GetSecurityStyle(security_info, &explanations);
     content::SecurityStyleExplanation explanation;
     ASSERT_TRUE(FindSecurityStyleExplanation(
-        explanations.secure_explanations, "Secure Connection", &explanation));
+        explanations.secure_explanations, "Secure connection", &explanation));
     EXPECT_EQ(
         "The connection to this site is encrypted and authenticated using a "
         "strong protocol (TLS 1.3), a strong key exchange (X25519), and a "

components/security_state_strings.grdp

@@ -2,7 +2,7 @@
 <grit-part>
   <!-- Strings describing Chrome security policy for DevTools security panel -->
   <message name="IDS_PRIVATE_USER_DATA_INPUT" desc="Summary phrase for a security problem where the site collects private user data on an insecure page." translateable="false">
-    Private User Data Input
+    Private user data input
   </message>
   <message name="IDS_PRIVATE_USER_DATA_INPUT_DESCRIPTION" desc="Description of a security problem where the site collects private user data on an insecure page, which results in an omnibox warning." translateable="false">
     This page includes a password or credit card input over HTTP. A warning has been added to the URL bar.
@@ -11,37 +11,43 @@
     This page is dangerous (flagged by Google Safe Browsing).
   </message>
   <message name="IDS_SHA1" desc="Summary phrase for a security problem where the site's certificate chain contains a SHA1 signature." translateable="false">
-    SHA-1 Certificate
+    SHA-1 certificate
   </message>
   <message name="IDS_SHA1_DESCRIPTION" desc="Description of a security problem where the site's certificate chain contains a SHA1 signature." translateable="false">
     The certificate chain for this site contains a certificate signed using SHA-1.
   </message>
   <message name="IDS_SUBJECT_ALT_NAME_MISSING" desc="Summary phrase for a security problem where the site's certificate is missing a subjectAltName extension." translateable="false">
-    Subject Alternative Name Missing
+    Subject Alternative Name missing
   </message>
   <message name="IDS_SUBJECT_ALT_NAME_MISSING_DESCRIPTION" desc="Description of a security problem where the site's certificate is missing a subjectAltName extension." translateable="false">
     The certificate for this site does not contain a Subject Alternative Name extension containing a domain name or IP address.
   </message>
   <message name="IDS_CERTIFICATE_CHAIN_ERROR" desc="Summary phrase for a security problem with the site's certificate." translateable="false">
-    Certificate Error
+    Certificate error
   </message>
   <message name="IDS_CERTIFICATE_CHAIN_ERROR_DESCRIPTION_FORMAT" desc="Description of a security problem with the site's certificate." translateable="false">
     There are issues with the site's certificate chain (<ph name="CERT_ERROR_DESCRIPTION">$1<ex>net::ERR_CERT_AUTHORITY_INVALID</ex></ph>).
   </message>
   <message name="IDS_VALID_SERVER_CERTIFICATE" desc="Summary phrase for a site that has a valid server certificate." translateable="false">
-    Valid Certificate
+    Valid certificate
   </message>
   <message name="IDS_VALID_SERVER_CERTIFICATE_DESCRIPTION" desc="Description of a site that has a valid server certificate." translateable="false">
     The connection to this site is using a valid, trusted server certificate.
   </message>
   <message name="IDS_STRONG_SSL_SUMMARY" desc="Summary phrase for a site that uses a modern, secure TLS protocol and cipher." translateable="false">
-    Secure Connection
+    Secure connection
+  </message>
+  <message name="IDS_PRIVATE_KEY_PINNING_BYPASSED" desc="Summary phrase for a security state where Private Key Pinning is ignored because the certificate chains to a locally-trusted root." translateable="false">
+    Public-Key-Pinning bypassed
+  </message>
+  <message name="IDS_PRIVATE_KEY_PINNING_BYPASSED_DESCRIPTION" desc="Description of a security state where Private Key Pinning is ignored because the certificate chains to a locally-trusted root." translateable="false">
+    Public-Key-Pinning was bypassed by a local root certificate.
   </message>
   <message name="IDS_STRONG_SSL_DESCRIPTION" desc="Description of a site that uses a modern, secure TLS protocol and cipher." translateable="false">
     The connection to this site is encrypted and authenticated using a strong protocol (<ph name="PROTOCOL_VERSION">$1<ex>TLS 1.2</ex></ph>), a strong key exchange (<ph name="KEY_EXCHANGE">$2<ex>ECDHE_RSA</ex></ph>), and a strong cipher (<ph name="CIPHER_SUTE">$3<ex>AES_128_GCM</ex></ph>).
   </message>
   <message name="IDS_OBSOLETE_SSL_SUMMARY" desc="Summary phrase for a site that uses an outdated SSL settings (protocol, key exchange, or cipher)." translateable="false">
-    Obsolete Connection Settings
+    Obsolete connection settings
   </message>
   <message name="IDS_OBSOLETE_SSL_DESCRIPTION" desc="Description of a site that uses an outdated TLS protocol or cipher." translateable="false">
     The connection to this site uses <ph name="A_PROTOCOL">$1<ex>an obsolete protocol</ex></ph> (<ph name="PROTOCOL">$2<ex>TLS 1.0</ex></ph>), <ph name="A_KEY_EXCHANGE">$3<ex>an obsolete key exchange</ex></ph> (<ph name="KEY_EXCHANGE">$4<ex>ECDHE_RSA</ex></ph>), and <ph name="A_CIPHER">$5<ex>an obsolete cipher</ex></ph> (<ph name="CIPHER">$6<ex>AES_256_CBC with HMAC-SHA1</ex></ph>).

third_party/WebKit/LayoutTests/http/tests/inspector/security/blank-origins-not-shown-expected.txt

 Tests that blank origins aren't shown in the security panel origins list.
 
-Group: Main Origin
-Group: Unknown / Canceled
+Group: Main origin
+Group: Unknown / canceled
 <SPAN class=title >
 https://foo.test
 </SPAN>

third_party/WebKit/LayoutTests/http/tests/inspector/security/failed-request-expected.txt

 Tests that origins with failed requests are shown correctly in the security panel origins list.
 
-Group: Main Origin
-Group: Secure Origins
+Group: Main origin
+Group: Secure origins
 <SPAN class=title >
 https://foo.test
 </SPAN>
-Group: Unknown / Canceled
+Group: Unknown / canceled
 <SPAN class=title >
 https://does-not-resolve.test
 </SPAN>

third_party/WebKit/LayoutTests/http/tests/inspector/security/interstitial-sidebar-expected.txt

@@ -28,7 +28,7 @@ Overview
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Main Origin
+Main origin
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >
@@ -46,7 +46,7 @@ Reload to view details
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Non-Secure Origins
+Non-secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -55,7 +55,7 @@ Non-Secure Origins
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Secure Origins
+Secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >
@@ -90,7 +90,7 @@ https://bar.test
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Unknown / Canceled
+Unknown / canceled
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -131,7 +131,7 @@ Overview
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Main Origin
+Main origin
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -149,7 +149,7 @@ Reload to view details
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Non-Secure Origins
+Non-secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -158,7 +158,7 @@ Non-Secure Origins
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Secure Origins
+Secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -193,7 +193,7 @@ https://bar.test
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Unknown / Canceled
+Unknown / canceled
                     </SPAN>
                 </LI>
                 <OL class=children expanded hidden role=group >
@@ -234,7 +234,7 @@ Overview
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Main Origin
+Main origin
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >
@@ -252,7 +252,7 @@ Reload to view details
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Non-Secure Origins
+Non-secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >
@@ -261,7 +261,7 @@ Non-Secure Origins
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Secure Origins
+Secure origins
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >
@@ -296,7 +296,7 @@ https://bar.test
                     <DIV class=selection fill >
                     </DIV>
                     <SPAN class=tree-element-title >
-Unknown / Canceled
+Unknown / canceled
                     </SPAN>
                 </LI>
                 <OL class=children expanded role=group >

third_party/WebKit/LayoutTests/http/tests/inspector/security/main-origin-assigned-despite-request-missing-expected.txt

@@ -2,11 +2,11 @@ Tests that the Main Origin is assigned even if there is no matching Request.
 
 Page origin: http://127.0.0.1:8000
 Detected main origin: http://127.0.0.1:8000
-Group: Main Origin
+Group: Main origin
 <SPAN class=title >
 http://127.0.0.1:8000
 </SPAN>
-Group: Unknown / Canceled
+Group: Unknown / canceled
 <SPAN class=title >
 https://foo.test
 </SPAN>

third_party/WebKit/LayoutTests/http/tests/inspector/security/mixed-content-active-and-passive-reload-expected.txt

@@ -5,7 +5,7 @@ Tests that the active and pasive mixed content explanations prompt the user to r
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Active Mixed Content
+Active mixed content
         </DIV>
         <DIV >
 You have recently allowed non-secure content (such as scripts or iframes) to run on this site.
@@ -20,7 +20,7 @@ Reload the page to record requests for HTTP resources.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.
@@ -35,7 +35,7 @@ Reload the page to record requests for HTTP resources.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Active Mixed Content
+Active mixed content
         </DIV>
         <DIV >
 You have recently allowed non-secure content (such as scripts or iframes) to run on this site.
@@ -50,7 +50,7 @@ View 1 request in Network Panel
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.

third_party/WebKit/LayoutTests/http/tests/inspector/security/mixed-content-and-subresources-with-cert-errors-expected.txt

@@ -5,7 +5,7 @@ Tests addition of explanation when there was both mixed content and subresources
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Active Mixed Content
+Active mixed content
         </DIV>
         <DIV >
 You have recently allowed non-secure content (such as scripts or iframes) to run on this site.
@@ -20,7 +20,7 @@ Reload the page to record requests for HTTP resources.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.

third_party/WebKit/LayoutTests/http/tests/inspector/security/mixed-content-reload-expected.txt

@@ -5,7 +5,7 @@ Tests that the mixed content explanation prompts the user to refresh when there
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.
@@ -20,7 +20,7 @@ Reload the page to record requests for HTTP resources.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.

third_party/WebKit/LayoutTests/http/tests/inspector/security/mixed-form-expected.txt

@@ -7,7 +7,7 @@ Security Explanations (Mixed Form Only) --------------
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Non-secure Form
+Non-secure form
         </DIV>
         <DIV >
 The page includes a form with a non-secure "action" attribute.
@@ -19,7 +19,7 @@ The page includes a form with a non-secure "action" attribute.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.
@@ -33,7 +33,7 @@ Security Explanations (Mixed Form + Mixed Passive) --------------
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Non-secure Form
+Non-secure form
         </DIV>
         <DIV >
 The page includes a form with a non-secure "action" attribute.
@@ -45,7 +45,7 @@ The page includes a form with a non-secure "action" attribute.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Mixed Content
+Mixed content
         </DIV>
         <DIV >
 The site includes HTTP resources.

third_party/WebKit/LayoutTests/http/tests/inspector/security/origin-view-then-interstitial-expected.txt

@@ -4,7 +4,7 @@ Before selecting origin view:
 <DIV class=widget vbox security-main-view >
     <DIV class=security-summary >
         <DIV class=security-summary-section-title >
-Security Overview
+Security overview
         </DIV>
         <DIV class=lock-spectrum >
             <DIV class=lock-icon lock-icon-secure >
@@ -48,7 +48,7 @@ View requests in Network Panel
     </DIV>
     <DIV class=origin-view-section >
         <DIV class=origin-view-section-title >
-Not Secure
+Not secure
         </DIV>
         <DIV >
 Your connection to this origin is not secure.
@@ -59,7 +59,7 @@ After interstitial is shown:
 <DIV class=widget vbox security-main-view >
     <DIV class=security-summary >
         <DIV class=security-summary-section-title >
-Security Overview
+Security overview
         </DIV>
         <DIV class=lock-spectrum >
             <DIV class=lock-icon lock-icon-secure >

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-all-resources-secure-expected.txt

@@ -5,7 +5,7 @@ Tests addition of explanation when all page resources are transferred securely (
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-blocked-mixed-content-and-malicious-expected.txt

@@ -8,7 +8,7 @@ Test: Summary Override Text
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-blocked-mixed-content-expected.txt

@@ -5,7 +5,7 @@ Tests active mixed content blocking in the security panel.
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.
@@ -32,7 +32,7 @@ View 1 request in Network Panel
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-details-updated-with-security-state-expected.txt

 Tests that the security details for an origin are updated if its security state changes.
 
 Sidebar Origins --------------------------------
-Group: Main Origin
-Group: Secure Origins
+Group: Main origin
+Group: Secure origins
 <SPAN class=title >
 https://foo.test
 </SPAN>
-Group: Unknown / Canceled
+Group: Unknown / canceled
 <SPAN class=title >
 https://bar.test
 </SPAN>
@@ -43,7 +43,7 @@ TLS 1.2
             </DIV>
             <DIV class=details-table-row >
                 <DIV >
-Key Exchange
+Key exchange
                 </DIV>
                 <DIV >
 Key_Exchange
@@ -89,7 +89,7 @@ foo.test
             </DIV>
             <DIV class=details-table-row >
                 <DIV >
-Valid From
+Valid from
                 </DIV>
                 <DIV >
 Mon, 20 Mar 2017 08:53:20 GMT
@@ -97,7 +97,7 @@ Mon, 20 Mar 2017 08:53:20 GMT
             </DIV>
             <DIV class=details-table-row >
                 <DIV >
-Valid Until
+Valid until
                 </DIV>
                 <DIV >
 Wed, 18 May 2033 03:33:20 GMT

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-explanation-ordering-expected.txt

@@ -42,7 +42,7 @@ The connection to this site uses a strong protocol (TLS 1.2), a strong key excha
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-secure-but-malicious-expected.txt

@@ -8,7 +8,7 @@ Test: Summary Override Text
     </DIV>
     <DIV class=security-explanation-text >
         <DIV class=security-explanation-title >
-Secure Resources
+Secure resources
         </DIV>
         <DIV >
 All resources on this page are served securely.

third_party/WebKit/LayoutTests/http/tests/inspector/security/security-unknown-resource-expected.txt

 Tests that requests to unresolved origins result in unknown security state and show up in the sidebar origin list.
 
-Group: Main Origin
-Group: Unknown / Canceled
+Group: Main origin
+Group: Unknown / canceled
 <SPAN class=title >
 http://unknown
 </SPAN>

third_party/WebKit/Source/devtools/front_end/security/SecurityPanel.js

@@ -498,10 +498,10 @@ Security.SecurityPanelSidebarTree = class extends UI.TreeOutlineInShadow {
  * @enum {string}
  */
 Security.SecurityPanelSidebarTree.OriginGroupName = {
-  MainOrigin: Common.UIString('Main Origin'),
-  NonSecure: Common.UIString('Non-Secure Origins'),
-  Secure: Common.UIString('Secure Origins'),
-  Unknown: Common.UIString('Unknown / Canceled')
+  MainOrigin: Common.UIString('Main origin'),
+  NonSecure: Common.UIString('Non-secure origins'),
+  Secure: Common.UIString('Secure origins'),
+  Unknown: Common.UIString('Unknown / canceled')
 };
 
 /**
@@ -589,12 +589,12 @@ Security.SecurityMainView = class extends UI.VBox {
 
     // Fill the security summary section.
     this._summarySection.createChild('div', 'security-summary-section-title').textContent =
-        Common.UIString('Security Overview');
+        Common.UIString('Security overview');
 
     var lockSpectrum = this._summarySection.createChild('div', 'lock-spectrum');
     lockSpectrum.createChild('div', 'lock-icon lock-icon-secure').title = Common.UIString('Secure');
-    lockSpectrum.createChild('div', 'lock-icon lock-icon-neutral').title = Common.UIString('Not Secure');
-    lockSpectrum.createChild('div', 'lock-icon lock-icon-insecure').title = Common.UIString('Not Secure (Broken)');
+    lockSpectrum.createChild('div', 'lock-icon lock-icon-neutral').title = Common.UIString('Not secure');
+    lockSpectrum.createChild('div', 'lock-icon lock-icon-insecure').title = Common.UIString('Not secure (broken)');
 
     this._summarySection.createChild('div', 'triangle-pointer-container')
         .createChild('div', 'triangle-pointer-wrapper')
@@ -680,7 +680,7 @@ Security.SecurityMainView = class extends UI.VBox {
          !this._insecureContentStatus.ranContentWithCertErrors)) {
       this._addExplanation(this._securityExplanationsMain, /** @type {!Protocol.Security.SecurityStateExplanation} */ ({
                              'securityState': Protocol.Security.SecurityState.Secure,
-                             'summary': Common.UIString('Secure Resources'),
+                             'summary': Common.UIString('Secure resources'),
                              'description': Common.UIString('All resources on this page are served securely.')
                            }));
     }
@@ -696,7 +696,7 @@ Security.SecurityMainView = class extends UI.VBox {
       if (this._insecureContentStatus.ranMixedContent) {
         this._addMixedContentExplanation(
             this._securityExplanationsMain, this._insecureContentStatus.ranInsecureContentStyle,
-            Common.UIString('Active Mixed Content'),
+            Common.UIString('Active mixed content'),
             Common.UIString(
                 'You have recently allowed non-secure content (such as scripts or iframes) to run on this site.'),
             Network.NetworkLogView.MixedContentFilterValues.BlockOverridden,
@@ -706,13 +706,13 @@ Security.SecurityMainView = class extends UI.VBox {
         this._addMixedFormExplanation(
             // TODO(elawrence): Replace |displayedInsecureContentStyle| with |containedMixedFormStyle|. https://crbug.com/705003
             this._securityExplanationsMain, this._insecureContentStatus.displayedInsecureContentStyle,
-            Common.UIString('Non-secure Form'),
+            Common.UIString('Non-secure form'),
             Common.UIString('The page includes a form with a non-secure "action" attribute.'));
       }
       if (this._insecureContentStatus.displayedMixedContent) {
         this._addMixedContentExplanation(
             this._securityExplanationsMain, this._insecureContentStatus.displayedInsecureContentStyle,
-            Common.UIString('Mixed Content'), Common.UIString('The site includes HTTP resources.'),
+            Common.UIString('Mixed content'), Common.UIString('The site includes HTTP resources.'),
             Network.NetworkLogView.MixedContentFilterValues.Displayed, showDisplayedMixedContentInNetworkPanel);
       }
     }
@@ -877,13 +877,13 @@ Security.SecurityOriginView = class extends UI.VBox {
 
       var table = new Security.SecurityDetailsTable();
       connectionSection.appendChild(table.element());
-      table.addRow('Protocol', originState.securityDetails.protocol);
+      table.addRow(Common.UIString('Protocol'), originState.securityDetails.protocol);
       if (originState.securityDetails.keyExchange)
-        table.addRow('Key Exchange', originState.securityDetails.keyExchange);
+        table.addRow(Common.UIString('Key exchange'), originState.securityDetails.keyExchange);
       if (originState.securityDetails.keyExchangeGroup)
-        table.addRow('Key Exchange Group', originState.securityDetails.keyExchangeGroup);
+        table.addRow(Common.UIString('Key exchange group'), originState.securityDetails.keyExchangeGroup);
       table.addRow(
-          'Cipher', originState.securityDetails.cipher +
+          Common.UIString('Cipher'), originState.securityDetails.cipher +
               (originState.securityDetails.mac ? ' with ' + originState.securityDetails.mac : ''));
 
       // Create the certificate section outside the callback, so that it appears in the right place.
@@ -905,8 +905,8 @@ Security.SecurityOriginView = class extends UI.VBox {
       certificateSection.appendChild(table.element());
       table.addRow(Common.UIString('Subject'), originState.securityDetails.subjectName);
       table.addRow(Common.UIString('SAN'), sanDiv);
-      table.addRow(Common.UIString('Valid From'), validFromString);
-      table.addRow(Common.UIString('Valid Until'), validUntilString);
+      table.addRow(Common.UIString('Valid from'), validFromString);
+      table.addRow(Common.UIString('Valid until'), validUntilString);
       table.addRow(Common.UIString('Issuer'), originState.securityDetails.issuer);
       table.addRow(
           '', Security.SecurityPanel.createCertificateViewerButton2(
@@ -932,14 +932,14 @@ Security.SecurityOriginView = class extends UI.VBox {
         var sctTable = new Security.SecurityDetailsTable();
         sctTableWrapper.appendChild(sctTable.element());
         var sct = originState.securityDetails.signedCertificateTimestampList[i];
-        sctTable.addRow(Common.UIString('Log Name'), sct.logDescription);
+        sctTable.addRow(Common.UIString('Log name'), sct.logDescription);
         sctTable.addRow(Common.UIString('Log ID'), sct.logId.replace(/(.{2})/g, '$1 '));
-        sctTable.addRow(Common.UIString('Validation Status'), sct.status);
+        sctTable.addRow(Common.UIString('Validation status'), sct.status);
         sctTable.addRow(Common.UIString('Source'), sct.origin);
-        sctTable.addRow(Common.UIString('Issued At'), new Date(sct.timestamp).toUTCString());
-        sctTable.addRow(Common.UIString('Hash Algorithm'), sct.hashAlgorithm);
-        sctTable.addRow(Common.UIString('Signature Algorithm'), sct.signatureAlgorithm);
-        sctTable.addRow(Common.UIString('Signature Data'), sct.signatureData.replace(/(.{2})/g, '$1 '));
+        sctTable.addRow(Common.UIString('Issued at'), new Date(sct.timestamp).toUTCString());
+        sctTable.addRow(Common.UIString('Hash algorithm'), sct.hashAlgorithm);
+        sctTable.addRow(Common.UIString('Signature algorithm'), sct.signatureAlgorithm);
+        sctTable.addRow(Common.UIString('Signature data'), sct.signatureData.replace(/(.{2})/g, '$1 '));
       }
 
       // Add link to toggle between displaying of the summary of the SCT(s) and the detailed SCT(s).
@@ -963,13 +963,13 @@ Security.SecurityOriginView = class extends UI.VBox {
           Common.UIString('The security details above are from the first inspected response.');
     } else if (originState.securityState !== Protocol.Security.SecurityState.Unknown) {
       var notSecureSection = this.element.createChild('div', 'origin-view-section');
-      notSecureSection.createChild('div', 'origin-view-section-title').textContent = Common.UIString('Not Secure');
+      notSecureSection.createChild('div', 'origin-view-section-title').textContent = Common.UIString('Not secure');
       notSecureSection.createChild('div').textContent =
           Common.UIString('Your connection to this origin is not secure.');
     } else {
       var noInfoSection = this.element.createChild('div', 'origin-view-section');
       noInfoSection.createChild('div', 'origin-view-section-title').textContent =
-          Common.UIString('No Security Information');
+          Common.UIString('No security information');
       noInfoSection.createChild('div').textContent =
           Common.UIString('No security details are available for this origin.');
     }
@@ -982,7 +982,7 @@ Security.SecurityOriginView = class extends UI.VBox {
   _createSanDiv(sanList) {
     var sanDiv = createElement('div');
     if (sanList.length === 0) {
-      sanDiv.textContent = Common.UIString('(N/A)');
+      sanDiv.textContent = Common.UIString('(n/a)');
       sanDiv.classList.add('empty-san');
     } else {
       var truncatedNumToShow = 2;