[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)

[jkarlin, 2015/10/14 18:30:29]

You'll need a non-android definition of this function as well.

[iclelland, 2015/10/14 19:31:24]

Currently the non-Android version is the default null implementation from the
parent class. Since we don't have code yet to start the desktop browsers (and
that wouldn't be part of this CL anyway) should I leave a TODO here?

+void BackgroundSyncControllerImpl::LaunchBrowserWhenNextOnline(
+    const content::BackgroundSyncManager* registrant,
+    bool launch_when_next_online) {

[jkarlin, 2015/10/14 18:30:29]

DCHECK thread

[iclelland, 2015/10/14 19:31:24]

Done.

+  chrome::android::BackgroundSyncLauncherAndroid::LaunchBrowserWhenNextOnline(
+      registrant, launch_when_next_online);
+}
+#endif