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

android_webview/browser/aw_content_browser_client.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 ANDROID_WEBVIEW_LIB_AW_CONTENT_BROWSER_CLIENT_H_
 #define ANDROID_WEBVIEW_LIB_AW_CONTENT_BROWSER_CLIENT_H_
 
 #include "android_webview/browser/aw_web_preferences_populater.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 122 matching lines @@
       const GURL& url,
       bool private_api,
       const content::SocketPermissionRequest* params) override;
   void OverrideWebkitPrefs(content::RenderViewHost* rvh,
                            content::WebPreferences* web_prefs) override;
 #if defined(VIDEO_HOLE)
   content::ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(
       content::WebContents* web_contents) override;
 #endif
-  content::DevToolsManagerDelegate* GetDevToolsManagerDelegate() override;
 
  private:
   // Android WebView currently has a single global (non-off-the-record) browser
   // context.
   scoped_ptr<AwBrowserContext> browser_context_;
   scoped_ptr<AwWebPreferencesPopulater> preferences_populater_;
 
   JniDependencyFactory* native_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AwContentBrowserClient);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_LIB_AW_CONTENT_BROWSER_CLIENT_H_