Push API: Validate storage before returning cached subscriptions

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 eaa66c894d182fea831ea919e8b275cdc9edd992..ece564a68c9a825c0f76ce203219f1fc34e02dd5 100644
--- a/components/gcm_driver/fake_gcm_client.cc
+++ b/components/gcm_driver/fake_gcm_client.cc
@@ -141,6 +141,12 @@ void FakeGCMClient::Register(
                             registration_id));
 }
 
+bool FakeGCMClient::ValidateRegistration(
+    const linked_ptr<RegistrationInfo>& registration_info,
+    const std::string& registration_id) {
+  return true;
+}
+
 void FakeGCMClient::Unregister(
     const linked_ptr<RegistrationInfo>& registration_info) {
   DCHECK(io_thread_->RunsTasksOnCurrentThread());