Unregister GCMInvalidationBridge from GCMDriver when user signs out.

components/invalidation/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/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/gcm_driver/gcm_driver.h"
 #include "components/invalidation/gcm_invalidation_bridge.h"
@@ skipping 262 matching lines @@
   DCHECK(CalledOnValidThread());
   core_thread_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&GCMInvalidationBridge::Core::RegisterFinished,
                  core_,
                  callback,
                  registration_id,
                  result));
 }
 
+void GCMInvalidationBridge::Unregister() {
+  DCHECK(CalledOnValidThread());
+  // No-op if GCMClient is disabled.
+  if (gcm_driver_ == NULL)
+    return;
+
+  gcm_driver_->Unregister(
+      kInvalidationsAppId,
+      base::Bind(&GCMInvalidationBridge::UnregisterFinishedNoOp));
+}
+
+// static
+void GCMInvalidationBridge::UnregisterFinishedNoOp(
+    gcm::GCMClient::Result result) {
+  // No-op.
+}
+
 void GCMInvalidationBridge::SubscribeForIncomingMessages() {
   // No-op if GCMClient is disabled.
   if (gcm_driver_ == NULL)
     return;
 
   DCHECK(!subscribed_for_incoming_messages_);
   gcm_driver_->AddAppHandler(kInvalidationsAppId, this);
   gcm_driver_->AddConnectionObserver(this);
   core_thread_task_runner_->PostTask(
       FROM_HERE,
@@ skipping 57 matching lines @@
 }
 
 void GCMInvalidationBridge::OnDisconnected() {
   core_thread_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&GCMInvalidationBridge::Core::OnConnectionStateChanged,
                  core_,
                  false));
 }
 
-
 }  // namespace invalidation