Move IdentityProvider usage from GCMDriverDesktop to GCMProfileService

components/gcm_driver/fake_gcm_driver.h

Index: components/gcm_driver/fake_gcm_driver.h
diff --git a/components/gcm_driver/fake_gcm_driver.h b/components/gcm_driver/fake_gcm_driver.h
index 25c41c0202bee64979d01cb6f19f9c4dc1a03ba3..f61b981ccc5b65a53ca30d0de8ec0c790e4eb6f7 100644
--- a/components/gcm_driver/fake_gcm_driver.h
+++ b/components/gcm_driver/fake_gcm_driver.h
@@ -23,6 +23,8 @@ class FakeGCMDriver : public GCMDriver {
   virtual void RemoveAppHandler(const std::string& app_id) OVERRIDE;
 
   // GCMDriver implementation:
+  virtual void OnSignedIn() OVERRIDE;
+  virtual void Purge() OVERRIDE;
   virtual void Enable() OVERRIDE;
   virtual void Disable() OVERRIDE;
   virtual GCMClient* GetGCMClientForTesting() const OVERRIDE;
@@ -32,7 +34,6 @@ class FakeGCMDriver : public GCMDriver {
                                 bool clear_logs) OVERRIDE;
   virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
                                bool recording) OVERRIDE;
-  virtual std::string SignedInUserName() const OVERRIDE;
 
  protected:
   // GCMDriver implementation: