cros: Bind hangup red button on remote controller to close web dialog

ui/views/controls/webview/web_dialog_view.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 UI_VIEWS_CONTROLS_WEBVIEW_WEB_DIALOG_VIEW_H_
 #define UI_VIEWS_CONTROLS_WEBVIEW_WEB_DIALOG_VIEW_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 74 matching lines @@
   void GetMinimumDialogSize(gfx::Size* size) const override;
   std::string GetDialogArgs() const override;
   void OnDialogShown(content::WebUI* webui,
                      content::RenderViewHost* render_view_host) override;
   void OnDialogClosed(const std::string& json_retval) override;
   void OnDialogCloseFromWebUI(const std::string& json_retval) override;
   void OnCloseContents(content::WebContents* source,
                        bool* out_close_dialog) override;
   bool ShouldShowDialogTitle() const override;
   bool HandleContextMenu(const content::ContextMenuParams& params) override;
+  bool AdditionalAccelerator(const ui::Accelerator& accelerator) const override;
 
   // Overridden from content::WebContentsDelegate:
   void MoveContents(content::WebContents* source,
                     const gfx::Rect& pos) override;
   void HandleKeyboardEvent(
       content::WebContents* source,
       const content::NativeWebKeyboardEvent& event) override;
   void CloseContents(content::WebContents* source) override;
   content::WebContents* OpenURLFromTab(
       content::WebContents* source,
@@ skipping 53 matching lines @@
 
   // Whether CloseContents() has been called.
   bool close_contents_called_;
 
   DISALLOW_COPY_AND_ASSIGN(WebDialogView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_WEBVIEW_WEB_DIALOG_VIEW_H_