Add missing using statements for JNI types.

device/power_save_blocker/power_save_blocker_android.cc

 // Copyright (c) 2012 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 "device/power_save_blocker/power_save_blocker.h"
 
 #include "base/android/jni_android.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "jni/PowerSaveBlocker_jni.h"
 #include "ui/android/view_android.h"
 
 namespace device {
 
 using base::android::AttachCurrentThread;
+using base::android::ScopedJavaLocalRef;
 
 class PowerSaveBlocker::Delegate
     : public base::RefCountedThreadSafe<PowerSaveBlocker::Delegate> {
  public:
   Delegate(base::WeakPtr<ui::ViewAndroid> view_android,
            scoped_refptr<base::SequencedTaskRunner> ui_task_runner);
 
   // Does the actual work to apply or remove the desired power save block.
   void ApplyBlock();
   void RemoveBlock();
@@ skipping 64 matching lines @@
     const base::WeakPtr<ui::ViewAndroid>& view_android) {
   DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
   if (!view_android)
     return;
 
   delegate_ = new Delegate(view_android, ui_task_runner_);
   delegate_->ApplyBlock();
 }
 
 }  // namespace device