Add Interstitial for user consent

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 2595 matching lines @@
         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_LAUNCH_BUTTON" desc="The label for a button that opens a list of nearby URLs">
         See what’s nearby
       </message>
       <message name="IDS_PHYSICAL_WEB_SHARE_ACTIVITY_TITLE" desc="Title of the Physical Web Share activity that will appear in the Android share dialog.">
         Physical Web
       </message>
+      <message name="IDS_PHYSICAL_WEB_SHARE_ENTRY_TITLE" desc="Label of the Physical Web Share Entry Activity.">
+        Physical Web Sharing
+      </message>
+      <message name="IDS_PHYSICAL_WEB_SHARE_ENTRY_MESSAGE" desc=".">
+        This service needs to anonymously send this website address to Google servers for verification

[cco3, 2017/03/16 22:54:33]

full stop.

[iankc, 2017/03/17 00:08:45]

Done.

+      </message>
+      <message name="IDS_PHYSICAL_WEB_SHARE_ENTRY_CONTINUE" desc="Label on button on the alert dialogue for the user to consent to use our service.">
+        Continue
+      </message>
+      <message name="IDS_PHYSICAL_WEB_SHARE_ENTRY_CANCEL" desc="Label on button to alert dialogue for the user to not use our service.">
+        Cancel
+      </message>
       <message name="IDS_PHYSICAL_WEB_BROADCAST_NOTIFICATION" desc="The message that will be displayed when a Physical Web URL is broadcasted successfully.">
         Website is broadcasting
       </message>
       <message name="IDS_PHYSICAL_WEB_STOP_BROADCAST" desc="The label for the button within a notification that stops a Physical Web broadcast.">
         Stop
       </message>
 
       <!-- WebUsb Picker UI strings -->
       <message name="IDS_USB_CHOOSER_DIALOG_PROMPT" desc="The text that is used to introduce the USB chooser dialog to the user.">
         <ph name="SITE">%1$s<ex>https://www.google.com</ex></ph> wants to connect
@@ skipping 132 matching lines @@
       </message>
       <message name="IDS_VR_SERVICES_CHECK_INFOBAR_INSTALL_BUTTON" desc="Text to be displayed in the VR Services check infobar confirm button for installing.">
         Install
       </message>
       <message name="IDS_VR_SERVICES_CHECK_INFOBAR_UPDATE_BUTTON" desc="Text to be displayed in the VR Services check infobar confirm button for updating.">
         Update
       </message>
     </messages>
   </release>
 </grit>