Introduced AndroidDeviceProvider to simplify testing.

chrome/browser/devtools/refcounted_adb_thread.h

+// Copyright (c) 2013 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.
+
+#ifndef CHROME_BROWSER_DEVTOOLS_REFCOUNTED_ADB_THREAD_H_
+#define CHROME_BROWSER_DEVTOOLS_REFCOUNTED_ADB_THREAD_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/message_loop/message_loop.h"
+#include "base/threading/thread.h"
+
+class RefCountedAdbThread : public base::RefCounted<RefCountedAdbThread> {
+ public:
+  static scoped_refptr<RefCountedAdbThread> GetInstance();
+  base::MessageLoop* message_loop();
+
+ private:
+  friend class base::RefCounted<RefCountedAdbThread>;
+  static RefCountedAdbThread* instance_;
+  static void StopThread(base::Thread* thread);
+
+  RefCountedAdbThread();
+  virtual ~RefCountedAdbThread();
+  base::Thread* thread_;
+};
+
+#endif  // CHROME_BROWSER_DEVTOOLS_REFCOUNTED_ADB_THREAD_H_