[DevTools] Rename DevToolsManagerImpl to DevToolsManager.

content/browser/devtools/devtools_manager_impl.h

-// 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.
-
-#ifndef CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_IMPL_H_
-#define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_IMPL_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/singleton.h"
-
-namespace content {
-
-class DevToolsManagerDelegate;
-
-// This class is a singleton that manage global DevTools state for the whole
-// browser.
-class DevToolsManagerImpl {
- public:
-  // Returns single instance of this class. The instance is destroyed on the
-  // browser main loop exit so this method MUST NOT be called after that point.
-  static DevToolsManagerImpl* GetInstance();
-
-  DevToolsManagerImpl();
-  virtual ~DevToolsManagerImpl();
-
-  DevToolsManagerDelegate* delegate() const { return delegate_.get(); }
-  void OnClientAttached();
-  void OnClientDetached();
-
- private:
-  friend struct DefaultSingletonTraits<DevToolsManagerImpl>;
-
-  scoped_ptr<DevToolsManagerDelegate> delegate_;
-  int client_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(DevToolsManagerImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_MANAGER_IMPL_H_