[DevTools] Move DevToolsClientHost functionality out of DevToolsFrontendHost.

content/browser/devtools/devtools_frontend_host_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_FRONTEND_HOST_IMPL_H_
+#define CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_FRONTEND_HOST_IMPL_H_
+
+#include "content/public/browser/devtools_frontend_host.h"
+#include "content/public/browser/web_contents_observer.h"
+
+namespace content {
+
+class DevToolsFrontendHostImpl : public DevToolsFrontendHost,
+                                 public WebContentsObserver {
+ public:
+  DevToolsFrontendHostImpl(WebContents* web_contents,
+                           DevToolsFrontendHost::Delegate* delegate);
+  virtual ~DevToolsFrontendHostImpl();
+
+  // DevToolsFrontendHost implementation.
+  virtual void DispatchOnDevToolsFrontend(const std::string& message) OVERRIDE;
+
+ private:
+  // WebContentsObserver overrides.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void AboutToNavigateRenderView(
+      RenderViewHost* render_view_host) OVERRIDE;
+
+  void OnDispatchOnInspectorBackend(const std::string& message);
+  void OnDispatchOnEmbedder(const std::string& message);
+
+  DevToolsFrontendHost::Delegate* delegate_;
+  DISALLOW_COPY_AND_ASSIGN(DevToolsFrontendHostImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DEVTOOLS_DEVTOOLS_FRONTEND_HOST_IMPL_H_