Support getting and deleting token for Instance ID.

components/gcm_driver/fake_gcm_client.h

Index: components/gcm_driver/fake_gcm_client.h
diff --git a/components/gcm_driver/fake_gcm_client.h b/components/gcm_driver/fake_gcm_client.h
index c0b03daba88b17fbc856e8cb3c815001808468f5..921a49747e6deb8275231099a4f83fd4f2261201 100644
--- a/components/gcm_driver/fake_gcm_client.h
+++ b/components/gcm_driver/fake_gcm_client.h
@@ -41,9 +41,9 @@ class FakeGCMClient : public GCMClient {
       Delegate* delegate) override;
   void Start(StartMode start_mode) override;
   void Stop() override;
-  void Register(const std::string& app_id,
-                const std::vector<std::string>& sender_ids) override;
-  void Unregister(const std::string& app_id) override;
+  void Register(const linked_ptr<RegistrationInfo>& registration_info) override;
+  void Unregister(
+      const linked_ptr<RegistrationInfo>& registration_info) override;
   void Send(const std::string& app_id,
             const std::string& receiver_id,
             const OutgoingMessage& message) override;
@@ -82,9 +82,11 @@ class FakeGCMClient : public GCMClient {
   // Called on IO thread.
   void DoStart();
   void Started();
-  void RegisterFinished(const std::string& app_id,
-                        const std::string& registrion_id);
-  void UnregisterFinished(const std::string& app_id);
+  void RegisterFinished(
+      const linked_ptr<RegistrationInfo>& registration_info,
+      const std::string& registrion_id);
+  void UnregisterFinished(
+      const linked_ptr<RegistrationInfo>& registration_info);
   void SendFinished(const std::string& app_id, const OutgoingMessage& message);
   void MessageReceived(const std::string& app_id,
                        const IncomingMessage& message);