[DevTools] Only create DevToolsAgentHost for main frame and cross-process subframes.

content/browser/devtools/render_frame_devtools_agent_host.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_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 110 matching lines @@
   bool OnSetTouchEventEmulationEnabled(const IPC::Message& message);
 
   void OnDispatchOnInspectorFrontend(const DevToolsMessageChunk& message);
 
   void ClientDetachedFromRenderer();
 
   void InnerOnClientAttached();
   void InnerClientDetachedFromRenderer();
 
   bool IsChildFrame();
+  void DestroyOnRenderFrameGone();
 
   RenderFrameHostImpl* render_frame_host_;
   scoped_ptr<devtools::dom::DOMHandler> dom_handler_;
   scoped_ptr<devtools::input::InputHandler> input_handler_;
   scoped_ptr<devtools::inspector::InspectorHandler> inspector_handler_;
   scoped_ptr<devtools::network::NetworkHandler> network_handler_;
   scoped_ptr<devtools::page::PageHandler> page_handler_;
   scoped_ptr<devtools::power::PowerHandler> power_handler_;
   scoped_ptr<devtools::service_worker::ServiceWorkerHandler>
       service_worker_handler_;
   scoped_ptr<devtools::tracing::TracingHandler> tracing_handler_;
   scoped_ptr<devtools::emulation::EmulationHandler> emulation_handler_;
   scoped_ptr<DevToolsFrameTraceRecorder> frame_trace_recorder_;
 #if defined(OS_ANDROID)
   scoped_ptr<PowerSaveBlockerImpl> power_save_blocker_;
 #endif
   NotificationRegistrar registrar_;
   bool reattaching_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameDevToolsAgentHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_RENDER_FRAME_DEVTOOLS_AGENT_HOST_H_