PushMessaging.UnregistrationReason UMA should count GCM Store resets

chrome/browser/push_messaging/push_messaging_service_impl.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 "chrome/browser/push_messaging/push_messaging_service_impl.h"
 
 #include <vector>
 
 #include "base/barrier_closure.h"
 #include "base/base64url.h"
@@ skipping 237 matching lines @@
 
 void PushMessagingServiceImpl::ShutdownHandler() {
   // Shutdown() should come before and it removes us from the list of app
   // handlers of gcm::GCMDriver so this shouldn't ever been called.
   NOTREACHED();
 }
 
 void PushMessagingServiceImpl::OnStoreReset() {
   // Delete all cached subscriptions, since they are now invalid.
   for (const auto& identifier : PushMessagingAppIdentifier::GetAll(profile_)) {
+    RecordUnsubscribeReason(
+        content::PUSH_UNREGISTRATION_REASON_GCM_STORE_RESET);
     // Clear all the subscriptions in parallel, to reduce risk that shutdown
     // occurs before we finish clearing them.
     ClearPushSubscriptionId(profile_, identifier.origin(),
                             identifier.service_worker_registration_id(),
                             base::Bind(&base::DoNothing));
     // TODO(johnme): Fire pushsubscriptionchange/pushsubscriptionlost SW event.
   }
   PushMessagingAppIdentifier::DeleteAllFromPrefs(profile_);
 }
 
@@ skipping 704 matching lines @@
 }
 
 instance_id::InstanceIDDriver* PushMessagingServiceImpl::GetInstanceIDDriver()
     const {
   instance_id::InstanceIDProfileService* instance_id_profile_service =
       instance_id::InstanceIDProfileServiceFactory::GetForProfile(profile_);
   CHECK(instance_id_profile_service);
   CHECK(instance_id_profile_service->driver());
   return instance_id_profile_service->driver();
 }