html_viewer: Add DevToolsAgentImpl.

components/html_viewer/html_document.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 COMPONENTS_HTML_VIEWER_HTML_DOCUMENT_H_
 #define COMPONENTS_HTML_VIEWER_HTML_DOCUMENT_H_
 
 #include <set>
 
 #include "base/callback.h"
@@ skipping 21 matching lines @@
 }
 
 namespace mojo {
 class ViewManager;
 class View;
 }
 
 namespace html_viewer {
 
 class AxProviderImpl;
+class DevToolsAgentImpl;
 class Setup;
 class WebLayerTreeViewImpl;
 
 // A view for a single HTML document.
 class HTMLDocument : public blink::WebViewClient,
                      public blink::WebFrameClient,
                      public mojo::ViewManagerDelegate,
                      public mojo::ViewObserver,
                      public mojo::InterfaceFactory<mojo::AxProvider> {
  public:
@@ skipping 90 matching lines @@
   std::set<mojo::InterfaceRequest<mojo::AxProvider>*> ax_provider_requests_;
   std::set<AxProviderImpl*> ax_providers_;
 
   // A flag set on didFinishLoad.
   bool did_finish_load_ = false;
 
   Setup* setup_;
 
   scoped_ptr<TouchHandler> touch_handler_;
 
+  scoped_ptr<DevToolsAgentImpl> devtools_agent_;
+
   DISALLOW_COPY_AND_ASSIGN(HTMLDocument);
 };
 
 }  // namespace html_viewer
 
 #endif  // COMPONENTS_HTML_VIEWER_HTML_DOCUMENT_H_