[Background Sync] Use GcmNetworkManager to start the browser for sync events.

chrome/browser/background_sync/background_sync_controller_impl.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/background_sync/background_sync_controller_impl.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/rappor/rappor_utils.h"
 
+#if defined(OS_ANDROID)
+#include "chrome/browser/android/background_sync_launcher_android.h"
+#endif
+
 BackgroundSyncControllerImpl::BackgroundSyncControllerImpl(Profile* profile)
     : profile_(profile) {}
 
 BackgroundSyncControllerImpl::~BackgroundSyncControllerImpl() = default;
 
 rappor::RapporService* BackgroundSyncControllerImpl::GetRapporService() {
   return g_browser_process->rappor_service();
 }
 
 void BackgroundSyncControllerImpl::NotifyBackgroundSyncRegistered(
     const GURL& origin) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK_EQ(origin, origin.GetOrigin());
 
   if (profile_->IsOffTheRecord())
     return;
 
   rappor::SampleDomainAndRegistryFromGURL(
       GetRapporService(), "BackgroundSync.Register.Origin", origin);
 }
+
+#if defined(OS_ANDROID)
+void BackgroundSyncControllerImpl::LaunchBrowserWhenNextOnline(
+    const content::BackgroundSyncManager* registrant,
+    bool launch_when_next_online) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  BackgroundSyncLauncherAndroid::LaunchBrowserWhenNextOnline(
+      registrant, launch_when_next_online);
+}
+#endif