Add abstractions that let embedders drive tests of WebContents.

chrome/browser/ui/browser_dialogs.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_BROWSER_DIALOGS_H_
 #define CHROME_BROWSER_UI_BROWSER_DIALOGS_H_
 #pragma once
 
 #include "chrome/browser/ui/dialog_style.h"
 #include "ipc/ipc_message.h"
 #include "ui/gfx/native_widget_types.h"
 
 class Browser;
 class Extension;
 class HtmlDialogUIDelegate;
 class Profile;
 class SkBitmap;
-class TabContents;
 class TabContentsWrapper;
 class TabModalConfirmDialogDelegate;
 class TemplateURL;
 
 namespace content {
 class WebContents;
 }
 
 namespace browser {
 
@@ skipping 42 matching lines @@
 void ShowHungRendererDialog(content::WebContents* contents);
 void HideHungRendererDialog(content::WebContents* contents);
 
 // Shows a tab-modal dialog box.
 void ShowTabModalConfirmDialog(TabModalConfirmDialogDelegate* delegate,
                                TabContentsWrapper* wrapper);
 
 }  // namespace browser
 
 #endif  // CHROME_BROWSER_UI_BROWSER_DIALOGS_H_