Move IdentityProvider usage from GCMDriverDesktop to GCMProfileService

components/gcm_driver/gcm_driver_android.cc

Index: components/gcm_driver/gcm_driver_android.cc
diff --git a/components/gcm_driver/gcm_driver_android.cc b/components/gcm_driver/gcm_driver_android.cc
index d70fb1d415ada45583e364bb9056bef813a5b911..ab6c0f78f1016c58d47087355e015705386d7925 100644
--- a/components/gcm_driver/gcm_driver_android.cc
+++ b/components/gcm_driver/gcm_driver_android.cc
@@ -92,6 +92,12 @@ bool GCMDriverAndroid::RegisterBindings(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
+void GCMDriverAndroid::SignIn() {
+}
+
+void GCMDriverAndroid::Purge() {
+}
+
 void GCMDriverAndroid::Enable() {
 }
 
@@ -122,10 +128,6 @@ void GCMDriverAndroid::SetGCMRecording(const GetGCMStatisticsCallback& callback,
   NOTIMPLEMENTED();
 }
 
-std::string GCMDriverAndroid::SignedInUserName() const {
-  return std::string();
-}
-
 GCMClient::Result GCMDriverAndroid::EnsureStarted() {
   // TODO(johnme): Maybe we should check if GMS is available?
   return GCMClient::SUCCESS;