[GCM] Exposing persistence of account mappings in GCM Driver

components/gcm_driver/gcm_driver.h

Index: components/gcm_driver/gcm_driver.h
diff --git a/components/gcm_driver/gcm_driver.h b/components/gcm_driver/gcm_driver.h
index f75a8e31f51b14d4de57b36da43fbb7992d5977d..c4646edd096b7ab9a1bd1b4f91b2b1234a59b1b7 100644
--- a/components/gcm_driver/gcm_driver.h
+++ b/components/gcm_driver/gcm_driver.h
@@ -18,6 +18,7 @@
 namespace gcm {
 
 class GCMAppHandler;
+struct AccountMapping;
 
 // Bridge between GCM users in Chrome and the platform-specific implementation.
 class GCMDriver {
@@ -110,6 +111,13 @@ class GCMDriver {
   virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
                                bool recording) = 0;
 
+  // Updates the |account_mapping| information in persistent store.
+  virtual void UpdateAccountMapping(const AccountMapping& account_mapping) = 0;
+
+  // Removes the account mapping information reated to |account_id| from
+  // persistent store.
+  virtual void RemoveAccountMapping(const std::string& account_id) = 0;
+
  protected:
   // Ensures that the GCM service starts (if necessary conditions are met).
   virtual GCMClient::Result EnsureStarted() = 0;