[DevTools] Cleanup DevToolsTarget and DevToolsManagerDelegate after moving to devtools_discovery.

android_webview/browser/aw_dev_tools_manager_delegate.h

-// Copyright 2014 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 ANDROID_WEBVIEW_BROWSER_AW_DEV_TOOLS_MANAGER_DELEGATE_H_
-#define ANDROID_WEBVIEW_BROWSER_AW_DEV_TOOLS_MANAGER_DELEGATE_H_
-
-#include "base/basictypes.h"
-#include "content/public/browser/devtools_manager_delegate.h"
-
-namespace android_webview {
-
-// TODO(dgozman): remove this class after componentization of devtools_discovery
-// is finished.
-class AwDevToolsManagerDelegate : public content::DevToolsManagerDelegate {
- public:
-  AwDevToolsManagerDelegate();
-  ~AwDevToolsManagerDelegate() override;
-
-  // content::DevToolsManagerDelegate implementation.
-  void Inspect(content::BrowserContext* browser_context,
-               content::DevToolsAgentHost* agent_host) override {}
-  void DevToolsAgentStateChanged(content::DevToolsAgentHost* agent_host,
-                                 bool attached) override {}
-  base::DictionaryValue* HandleCommand(
-      content::DevToolsAgentHost* agent_host,
-      base::DictionaryValue* command_dict) override;
-  scoped_ptr<content::DevToolsTarget> CreateNewTarget(const GURL& url) override;
-  void EnumerateTargets(TargetCallback callback) override;
-  std::string GetPageThumbnailData(const GURL& url) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AwDevToolsManagerDelegate);
-};
-
-}  // namespace android_webview
-
-#endif  // ANDROID_WEBVIEW_BROWSER_AW_DEV_TOOLS_MANAGER_DELEGATE_H_