Add Physical Web opt-in dialog

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 143 matching lines @@
       </message>
       <message name="IDS_MORE" desc="Generic label for a button to show more items or options. [CHAR-LIMIT=20]">
         More
       </message>
       <message name="IDS_CLOSE" desc="Content description for a button to close a dialog or popup" >
         Close
       </message>
       <message name="IDS_NO_THANKS" desc="Generic label to say no thanks for a feature. [CHAR-LIMIT=32]">
         No Thanks
       </message>
+      <message name="IDS_ENABLE" desc="Generic label to enable a feature. [CHAR-LIMIT=32]">
+        Enable
+      </message>
       <message name="IDS_NEXT" desc="Generic label for a button to advance to the next item. [CHAR-LIMIT=20]">
         Next
       </message>
 
       <!-- Main Preferences -->
       <message name="IDS_PREFERENCES" desc="Title for Chrome's Settings.">
         Settings
       </message>
       <message name="IDS_MENU_HELP" desc="Menu item for opening the help page. [CHAR-LIMIT=27]">
         Help &amp; feedback
@@ skipping 2123 matching lines @@
 
       <!-- Physical Web strings -->
       <message name="IDS_PHYSICAL_WEB_PREF_TITLE" desc="Title for Physical Web preference.">
         Physical Web
       </message>
       <message name="IDS_PHYSICAL_WEB_PREF_DESCRIPTION" desc="Description for Physical Web preference">
         Discover web pages sent by nearby objects. Chrome gathers web pages associated with objects around you, sends them anonymously to a Google service to find the ones most useful to you, then displays them.
 
 You must have Bluetooth and Location turned on in order to use the Physical Web.
       </message>
+      <message name="IDS_PHYSICAL_WEB_OPTIN_TITLE" desc="The title for a dialog inviting the user to opt-in to the Physical Web.">
+        The Physical Web
+      </message>
+      <message name="IDS_PHYSICAL_WEB_OPTIN_DESCRIPTION" desc="Description of the Physical Web displayed in the opt-in dialog">
+        Discover web pages sent by nearby objects.
+
+Chrome will scan for nearby pages when your device is unlocked. These pages will go through a Google service to improve the quality of page results.
+      </message>
       <message name="IDS_PHYSICAL_WEB_LIST_URLS_ACTIVITY_TITLE" desc="The title for a dialog that shows a list of URLs broadcasted from nearby devices.">
         The Physical Web
       </message>
       <message name="IDS_PHYSICAL_WEB_NOTIFICATION_TITLE" desc="The message displayed in a notification when there are nearby URLs.">
         Physical Web pages nearby
       </message>
       <message name="IDS_PHYSICAL_WEB_OPTIN_NOTIFICATION_TITLE" desc="A notification message inviting the user to opt-in to the Physical Web.">
         Turn on the Physical Web
       </message>
       <message name="IDS_PHYSICAL_WEB_EMPTY_LIST" desc="The message displayed in place of a list of nearby URLs when there are no URLs to display.">
         No nearby Physical Web pages found
       </message>
       <message name="IDS_PHYSICAL_WEB_EMPTY_LIST_SCANNING" desc="The message displayed in place of a list of nearby URLs while still scanning for nearby URLs.">
         Looking for nearby Physical Web pages
       </message>
     </messages>
   </release>
 </grit>