Persist Instance ID data to GCM store.

components/gcm_driver/fake_gcm_client.cc

Index: components/gcm_driver/fake_gcm_client.cc
diff --git a/components/gcm_driver/fake_gcm_client.cc b/components/gcm_driver/fake_gcm_client.cc
index 17952888e98c7cf994113af5a0f91f20ceff07bb..ffa77d11db63188d38d4270d68306023faad89e2 100644
--- a/components/gcm_driver/fake_gcm_client.cc
+++ b/components/gcm_driver/fake_gcm_client.cc
@@ -137,6 +137,17 @@ void FakeGCMClient::SetLastTokenFetchTime(const base::Time& time) {
 void FakeGCMClient::UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer) {
 }
 
+void FakeGCMClient::AddInstanceIDData(const std::string& app_id,
+                                      const std::string& instance_id_data) {
+}
+
+void FakeGCMClient::RemoveInstanceIDData(const std::string& app_id) {
+}
+
+std::string FakeGCMClient::GetInstanceIDData(const std::string& app_id) {
+  return std::string();
+}
+
 void FakeGCMClient::PerformDelayedStart() {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());