Restrict sending GWS ID only to signed in users

chrome/browser/android/data_usage/external_data_use_observer.cc

 // Copyright 2015 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/android/data_usage/external_data_use_observer.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/metrics/field_trial.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 199 matching lines @@
 base::WeakPtr<ExternalDataUseObserver> ExternalDataUseObserver::GetWeakPtr() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return weak_factory_.GetWeakPtr();
 }
 
 DataUseTabModel* ExternalDataUseObserver::GetDataUseTabModel() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   return data_use_tab_model_;
 }
 
+void ExternalDataUseObserver::SetRegisterGoogleVariationID(
+    bool register_google_variation_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  // It is okay to use base::Unretained here since
+  // |external_data_use_observer_bridge_| is owned by |this|, and is destroyed
+  // on UI thread when |this| is destroyed.
+  ui_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&ExternalDataUseObserverBridge::SetRegisterGoogleVariationID,
+                 base::Unretained(external_data_use_observer_bridge_),
+                 register_google_variation_id));
+}
+
 }  // namespace android
 
 }  // namespace chrome