Add context_utils.h includes where needed.

chrome/browser/android/background_sync_launcher_android.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/background_sync_launcher_android.h"
 
+#include "base/android/context_utils.h"
 #include "content/public/browser/browser_thread.h"
 #include "jni/BackgroundSyncLauncher_jni.h"
 
 using content::BrowserThread;
 
 namespace {
 base::LazyInstance<BackgroundSyncLauncherAndroid> g_background_sync_launcher =
     LAZY_INSTANCE_INITIALIZER;
 }
 
@@ skipping 36 matching lines @@
   java_launcher_.Reset(Java_BackgroundSyncLauncher_create(
       env, base::android::GetApplicationContext()));
 }
 
 BackgroundSyncLauncherAndroid::~BackgroundSyncLauncherAndroid() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_BackgroundSyncLauncher_destroy(env, java_launcher_.obj());
 }