Move WebDialogWebContentsDelegate to ui/web_dialogs.

ui/web_dialogs/constrained_web_dialog_ui.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_WEB_DIALOGS_CONSTRAINED_WEB_DIALOG_UI_H_
 #define UI_WEB_DIALOGS_CONSTRAINED_WEB_DIALOG_UI_H_
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/web_dialogs/web_dialogs_export.h"
 
 class ConstrainedWindow;
 class Profile;
 class TabContents;
-class WebDialogWebContentsDelegate;
 
 namespace base {
 template<class T> class PropertyAccessor;
 }
 
 namespace content {
 class RenderViewHost;
 }
 
 namespace ui {
 class WebDialogDelegate;
+class WebDialogWebContentsDelegate;
 
 class WEB_DIALOGS_EXPORT ConstrainedWebDialogDelegate {
  public:
   virtual const WebDialogDelegate* GetWebDialogDelegate() const = 0;
   virtual WebDialogDelegate* GetWebDialogDelegate() = 0;
 
   // Called when the dialog is being closed in response to a "DialogClose"
   // message from WebUI.
   virtual void OnDialogCloseFromWebUI() = 0;
 
@@ skipping 61 matching lines @@
 // |overshadowed| is the tab being overshadowed by the dialog.
 ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
     Profile* profile,
     WebDialogDelegate* delegate,
     WebDialogWebContentsDelegate* tab_delegate,
     TabContents* overshadowed);
 
 }  // namespace ui
 
 #endif  // UI_WEB_DIALOGS_CONSTRAINED_WEB_DIALOG_UI_H_