Notify GCMAppHandlers when the store is reset, so they clear cached IDs

components/invalidation/impl/gcm_invalidation_bridge.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 301 matching lines @@
                  core_,
                  gcm_driver_->IsConnected()));
 
   subscribed_for_incoming_messages_ = true;
 }
 
 void GCMInvalidationBridge::ShutdownHandler() {
   // Nothing to do.
 }
 
+void GCMInvalidationBridge::OnStoreReset() {
+  // Nothing to do here since CacheInvalidation doesn't locally persist
+  // registration ID, instead it just re-registers on every startup.

[Peter Beverloo, 2016/11/03 17:28:57]

What about GCMNetworkChannel::registration_id_?

[johnme, 2016/11/08 19:22:41]

Done - this was a little more involved, as I had to add a method to the delegate
interface.

+}
+
 void GCMInvalidationBridge::OnMessage(const std::string& app_id,
                                       const gcm::IncomingMessage& message) {
   gcm::MessageData::const_iterator it;
   std::string content;
   std::string echo_token;
   it = message.data.find(kContentKey);
   if (it != message.data.end())
     content = it->second;
   it = message.data.find(kEchoTokenKey);
   if (it != message.data.end())
@@ skipping 36 matching lines @@
 
 void GCMInvalidationBridge::OnDisconnected() {
   core_thread_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&GCMInvalidationBridge::Core::OnConnectionStateChanged,
                  core_,
                  false));
 }
 
 }  // namespace invalidation