Push API: Store push registration IDs for GetRegistration etc

content/public/common/push_messaging_status.h

Index: content/public/common/push_messaging_status.h
diff --git a/content/public/common/push_messaging_status.h b/content/public/common/push_messaging_status.h
index 6ac9d962c1ea4e70233a469b40f4440a2c136541..ef5bf4fbda8a447f077d1e2c300619379a28607f 100644
--- a/content/public/common/push_messaging_status.h
+++ b/content/public/common/push_messaging_status.h
@@ -31,13 +31,16 @@ enum PushRegistrationStatus {
   // Registration failed because no sender id was provided by the page.
   PUSH_REGISTRATION_STATUS_NO_SENDER_ID = 6,
 
+  // Registration succeeded, but we failed to persist it.
+  PUSH_REGISTRATION_STATUS_STORAGE_ERROR = 7,
+
   // NOTE: Do not renumber these as that would confuse interpretation of
   // previously logged data. When making changes, also update the enum list
   // in tools/metrics/histograms/histograms.xml to keep it in sync, and
   // update PUSH_REGISTRATION_STATUS_LAST below.
 
   // Used for IPC message range checks.
-  PUSH_REGISTRATION_STATUS_LAST = PUSH_REGISTRATION_STATUS_NO_SENDER_ID
+  PUSH_REGISTRATION_STATUS_LAST = PUSH_REGISTRATION_STATUS_STORAGE_ERROR
 };
 
 // Push message delivery success / error codes for internal use.