MD Settings: drop subpage arrow from default browser section

Instead, show a "MAKE DEFAULT" button as a call to action so it's clearer
how a user can change their default browser.

R=dschuyler@chromium.org
BUG=651720
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2382243003
Cr-Commit-Position: refs/heads/master@{#422896}

chrome/app/settings_strings.grdp

@@ -398,6 +398,9 @@
     <message name="IDS_SETTINGS_DEFAULT_BROWSER" desc="Name of the Default Browser page, which allows users to set which browser will open .html files within the OS.">
       Default browser
     </message>
+    <message name="IDS_SETTINGS_DEFAULT_BROWSER_MAKE_DEFAULT_BUTTON" desc="Text of the button used to make Chrome the default browser on the user's system.">
+      Make default
+    </message>
   </if>
 
   <!-- Bluetooth Page -->

chrome/browser/resources/settings/default_browser_page/default_browser_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="/default_browser_page/default_browser_browser_proxy.html">
 <link rel="import" href="/icons.html">
 <link rel="import" href="/settings_shared_css.html">
@@ -14,13 +13,17 @@
       }
     </style>
     <template is="dom-if" if="[[maySetDefaultBrowser_]]">
-      <div class="settings-box first two-line" on-tap="onSetDefaultBrowserTap_"
-          actionable>
+      <div class="settings-box first two-line">
         <div class="start">
           <div id="canBeDefaultBrowser">$i18n{defaultBrowser}</div>
           <div class="secondary">$i18n{defaultBrowserMakeDefault}</div>
         </div>
-        <button class="icon-arrow-right" is="paper-icon-button-light"></button>
+        <div class="secondary-action">
+          <paper-button class="secondary-button"
+              on-tap="onSetDefaultBrowserTap_">
+            $i18n{defaultBrowserMakeDefaultButton}
+          </paper-button>
+        </div>
       </div>
     </template>
     <template is="dom-if" if="[[!maySetDefaultBrowser_]]">
@@ -37,7 +40,6 @@
           id="isUnknownError">
           $i18n{defaultBrowserError}
         </div>
-        <button class="icon-arrow-right" is="paper-icon-button-light"></button>
       </div>
     </template>
   </template>

chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc

@@ -469,6 +469,8 @@ void AddDefaultBrowserStrings(content::WebUIDataSource* html_source) {
       {"defaultBrowser", IDS_SETTINGS_DEFAULT_BROWSER},
       {"defaultBrowserDefault", IDS_SETTINGS_DEFAULT_BROWSER_DEFAULT},
       {"defaultBrowserMakeDefault", IDS_SETTINGS_DEFAULT_BROWSER_MAKE_DEFAULT},
+      {"defaultBrowserMakeDefaultButton",
+       IDS_SETTINGS_DEFAULT_BROWSER_MAKE_DEFAULT_BUTTON},
       {"defaultBrowserError", IDS_SETTINGS_DEFAULT_BROWSER_ERROR},
       {"defaultBrowserSecondary", IDS_SETTINGS_DEFAULT_BROWSER_SECONDARY},
   };