Chrome OS: Add Learm More link to Date and Time settings page.

Bug: 805078
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ib9f558e1154744b99d9ce750a165ade07a5bafb3
Reviewed-on: https://chromium-review.googlesource.com/900022Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534153}

chrome/browser/resources/settings/date_time_page/date_time_page.html

@@ -88,7 +88,8 @@
       <template is="dom-if" route-path="/dateTime/timeZone">
         <settings-subpage data-route="DATETIME_TIMEZONE_SUBPAGE"
             associated-control="[[$$('#timeZoneSettingsTrigger')]]"
-            page-title="$i18n{timeZoneSubpageTitle}">
+            page-title="$i18n{timeZoneSubpageTitle}"
+            learn-more-url="$i18n{timeZoneSettingsLearnMoreURL}">
           <timezone-subpage id="timezoneSubpage" prefs="{{prefs}}"
               active-time-zone-display-name="{{activeTimeZoneDisplayName}}">
           </timezone-subpage>

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

@@ -945,6 +945,11 @@ void AddDateTimeStrings(content::WebUIDataSource* html_source) {
   };
   AddLocalizedStringsBulk(html_source, localized_strings,
                           arraysize(localized_strings));
+  html_source->AddString(
+      "timeZoneSettingsLearnMoreURL",
+      base::ASCIIToUTF16(base::StringPrintf(
+          chrome::kTimeZoneSettingsLearnMoreURL,
+          g_browser_process->GetApplicationLocale().c_str())));
 }
 
 void AddEasyUnlockStrings(content::WebUIDataSource* html_source) {

chrome/common/url_constants.cc

@@ -311,4 +311,9 @@ const char kOutdatedPluginLearnMoreURL[] =
     "https://support.google.com/chrome/?p=ib_outdated_plugin";
 #endif
 
+#if defined(OS_CHROMEOS)
+const char kTimeZoneSettingsLearnMoreURL[] =
+    "https://support.google.com/chromebook/answer/177871?hl=%s";
+#endif
+
 }  // namespace chrome

chrome/common/url_constants.h

@@ -260,6 +260,11 @@ extern const char kBlockedPluginLearnMoreURL[];
 extern const char kOutdatedPluginLearnMoreURL[];
 #endif
 
+#if defined(OS_CHROMEOS)
+// The URL for the "Learn more" page for the time zone settings page.
+extern const char kTimeZoneSettingsLearnMoreURL[];
+#endif
+
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_URL_CONSTANTS_H_