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

components/gcm_driver/gcm_driver_desktop.cc

Index: components/gcm_driver/gcm_driver_desktop.cc
diff --git a/components/gcm_driver/gcm_driver_desktop.cc b/components/gcm_driver/gcm_driver_desktop.cc
index 7015990337a46d494be2a7bc3ee77324a472623b..6edd1519907613d29000e63baa11f4d603e377ca 100644
--- a/components/gcm_driver/gcm_driver_desktop.cc
+++ b/components/gcm_driver/gcm_driver_desktop.cc
@@ -66,6 +66,7 @@ class GCMDriverDesktop::IOWorker : public GCMClient::Delegate {
   void OnActivityRecorded() override;
   void OnConnected(const net::IPEndPoint& ip_endpoint) override;
   void OnDisconnected() override;
+  void OnStoreReset() override;
 
   // Called on IO thread.
   void Initialize(
@@ -303,6 +304,11 @@ void GCMDriverDesktop::IOWorker::OnDisconnected() {
                        base::Bind(&GCMDriverDesktop::OnDisconnected, service_));
 }
 
+void GCMDriverDesktop::IOWorker::OnStoreReset() {
+  ui_thread_->PostTask(FROM_HERE,
+                       base::Bind(&GCMDriverDesktop::OnStoreReset, service_));
+}
+
 void GCMDriverDesktop::IOWorker::Start(
     GCMClient::StartMode start_mode,
     const base::WeakPtr<GCMDriverDesktop>& service) {
@@ -1300,6 +1306,11 @@ void GCMDriverDesktop::OnDisconnected() {
     observer.OnDisconnected();
 }
 
+void GCMDriverDesktop::OnStoreReset() {
+  for (const auto& key_value : app_handlers())

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

I can't wait for the destructor-y C++17 syntax... (P0144R2)

for (const auto& [app_id, handler] : app_handlers()) { .. }

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

Acknowledged.

+    key_value.second->OnStoreReset();
+}
+
 void GCMDriverDesktop::GetGCMStatisticsFinished(
     const GCMClient::GCMStatistics& stats) {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());