Add a special about-page license message for when Crostini is installed

This message is also supposed to link to
/run/imageloader/cros-termina/<version>/about_os_credits.html on the
CrOS machine, but that is not present unless Termina is running. I
think that part will be more involved, so I want to do it in a second
CL.

Bug: 858832
Change-Id: I1ab11af69de6434ddcfacd4987951a05e50b3889
Reviewed-on: https://chromium-review.googlesource.com/1143169
Commit-Queue: Renée Wright <rjwright@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579703}

chrome/browser/resources/settings/about_page/about_page.html

@@ -4,6 +4,7 @@
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../icons.html">
 <link rel="import" href="../lifetime_browser_proxy.html">
+<link rel="import" href="../prefs/prefs.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_page/main_page_behavior.html">
 <link rel="import" href="../settings_page/settings_animated_pages.html">
@@ -264,7 +265,10 @@
           <div class="info-section">
             <div class="secondary">$i18nRaw{aboutProductLicense}</div>
 <if expr="chromeos">
-            <div class="secondary">$i18nRaw{aboutProductOsLicense}</div>
+            <div class="secondary"
+                inner-h-t-m-l="[[getAboutProductOsLicense_(
+                    showCrostiniLicense_)]]">
+            </div>
 </if>
           </div>
 <if expr="_google_chrome">

chrome/browser/resources/settings/about_page/about_page.js

@@ -42,6 +42,15 @@ Polymer({
 
     /** @private */
     hasEndOfLife_: Boolean,
+
+    /** @private */
+    showCrostini: Boolean,
+
+    /** @private */
+    showCrostiniLicense_: {
+      type: Boolean,
+      value: false,
+    },
     // </if>
 
     // <if expr="_google_chrome and is_macosx">
@@ -133,6 +142,7 @@ Polymer({
         'currentChannel_)',
     'updateShowButtonContainer_(' +
         'showRelaunch_, showRelaunchAndPowerwash_, showCheckUpdates_)',
+    'handleCrostiniEnabledChanged_(prefs.crostini.enabled.value)',
     // </if>
   ],
 
@@ -513,6 +523,26 @@ Polymer({
     return staleUpdatedStatus || this.checkStatus_(UpdateStatus.FAILED);
   },
 
+  /**
+   * @param {boolean} showCrostiniLicense True if Crostini is enabled and
+   * Crostini UI is allowed.
+   * @return {string}
+   * @private
+   */
+  getAboutProductOsLicense_: function(showCrostiniLicense) {
+    return showCrostiniLicense ?
+        this.i18nAdvanced('aboutProductOsWithLinuxLicense') :
+        this.i18nAdvanced('aboutProductOsLicense');
+  },
+
+  /**
+   * @param {boolean} enabled True if Crostini is enabled.
+   * @private
+   */
+  handleCrostiniEnabledChanged_: function(enabled) {
+    this.showCrostiniLicense_ = enabled && this.showCrostini;
+  },
+
   /**
    * @return {boolean}
    * @private

chrome/browser/resources/settings/settings_main/settings_main.html

@@ -54,7 +54,9 @@
       </settings-basic-page>
     </template>
     <template is="dom-if" if="[[showPages_.about]]">
-      <settings-about-page in-search-mode="[[inSearchMode_]]">
+      <settings-about-page in-search-mode="[[inSearchMode_]]"
+          prefs="{{prefs}}"
+          show-crostini="[[showCrostini]]">
       </settings-about-page>
     </template>
     <div id="overscroll" style="padding-bottom: [[overscroll_]]px"></div>

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

@@ -322,6 +322,11 @@ AboutHandler* AboutHandler::Create(content::WebUIDataSource* html_source,
       IDS_ABOUT_CROS_VERSION_LICENSE,
       base::ASCIIToUTF16(chrome::kChromeUIOSCreditsURL));
   html_source->AddString("aboutProductOsLicense", os_license);
+  base::string16 os_with_linux_license = l10n_util::GetStringFUTF16(
+      IDS_ABOUT_CROS_WITH_LINUX_VERSION_LICENSE,
+      base::ASCIIToUTF16(chrome::kChromeUIOSCreditsURL));
+  html_source->AddString("aboutProductOsWithLinuxLicense",
+                         os_with_linux_license);
   html_source->AddBoolean("aboutEnterpriseManaged", IsEnterpriseManaged());
 
   base::Time build_time = base::SysInfo::GetLsbReleaseTime();