chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/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 CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Size;
 }
 
 namespace content {
 class BrowserContext;
-class RenderViewHost;
 class WebContents;
 }
 
 namespace ui {
 class WebDialogDelegate;
-class WebDialogWebContentsDelegate;
 }
 
 class ConstrainedWebDialogDelegate {
  public:
   virtual const ui::WebDialogDelegate* GetWebDialogDelegate() const = 0;
   virtual ui::WebDialogDelegate* GetWebDialogDelegate() = 0;
 
   // Called when the dialog is being closed in response to a "dialogClose"
   // message from WebUI.
   virtual void OnDialogCloseFromWebUI() = 0;
@@ skipping 74 matching lines @@
 // |min_size| is the minimum size of the dialog.
 // |max_size| is the maximum size of the dialog.
 ConstrainedWebDialogDelegate* ShowConstrainedWebDialogWithAutoResize(
     content::BrowserContext* browser_context,
     ui::WebDialogDelegate* delegate,
     content::WebContents* overshadowed,
     const gfx::Size& min_size,
     const gfx::Size& max_size);
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_