ui: Cleanup class/struct forward declarations

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index b2b4fd38b41769c1acb55e5f4acac57cfc400a18..f50aa0ab727620f9d4a8d397fe0724fdd130adb6 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -214,10 +214,10 @@ CHAR-LIMIT guidelines:
       <message name="IDS_MANAGED_BY_YOUR_ADMINISTRATOR" desc="Popup message when the user clicks a UI element that has been disabled by enterprise policy.">
         Managed by your administrator
       </message>
-      <message name="IDS_MANAGED_BY_YOUR_PARENTS" desc="Popup message when the user clicks a UI element that has been disabled by his/her parents.">
+      <message name="IDS_MANAGED_BY_YOUR_PARENTS" desc="Popup message when the user clicks a UI element that has been disabled by their parents.">
         Managed by your parents
       </message>
-      <message name="IDS_MANAGED_BY_YOUR_PARENT" desc="Popup message when the user clicks a UI element that has been disabled by his/her parent.">
+      <message name="IDS_MANAGED_BY_YOUR_PARENT" desc="Popup message when the user clicks a UI element that has been disabled by their parent.">
         Managed by your parent
       </message>
       <message name="IDS_PREFS_SECTION_BASICS" desc='Title of "Basics" section of preferences. [CHAR-LIMIT=32]'>
@@ -2710,6 +2710,19 @@ You can control the Physical Web in Chrome Settings.
       <message name="IDS_INSTANT_APPS_OPEN_IN_APP" desc="Button label for the user action that will open an Instant App.">
         Open app
       </message>
+
+      <!-- WebAPK related strings -->
+      <message name="IDS_WEBAPK_UNKNOWN_SOURCES_DIALOG_TITLE" desc="Title of dialog warning user that installation from Unknown sources is required for WebAPK experiment.">
+        Improved Add to Home screen Experiment
+      </message>
+
+      <message name="IDS_WEBAPK_UNKNOWN_SOURCES_DIALOG_MESSAGE" desc="Text of dialog warning user that installation from Unknown sources is required for WebAPK experiment">
+        Turn on “Unknown sources” in Android security settings to try "Improved Add to Home screen" experiment. Be sure to disable this setting when you’re done trying it out.
+      </message>
+
+      <message name="IDS_WEBAPK_UNKNOWN_SOURCES_SETTINGS_BUTTON" desc="Button label for opening Android Settings from dialog warning user that installation from Unknown sources is required for WebAPK experiment.">
+        Settings
+      </message>
     </messages>
   </release>
 </grit>