Introduced base class for WebRTC browser tests, cleaned up duplication.

chrome/browser/media/media_stream_infobar_delegate.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_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 13 matching lines @@
   // Handles a permission request (in |request|) for |web_contents|.  If this
   // involves prompting the user, creates a media stream infobar delegate, then
   // checks for an existing infobar for |web_contents| and replaces it if found,
   // or just adds the new infobar otherwise.  Returns whether an infobar was
   // created.
   static bool Create(content::WebContents* web_contents,
                      const content::MediaStreamRequest& request,
                      const content::MediaResponseCallback& callback);
 
  private:
-  friend class MediaStreamInfobarTest;
-  friend class WebrtcBrowserTest;
-  friend class WebrtcVideoQualityBrowserTest;
+  friend class WebRtcTestBase;
 
   MediaStreamInfoBarDelegate(
       InfoBarService* infobar_service,
       scoped_ptr<MediaStreamDevicesController> controller);
 
   // ConfirmInfoBarDelegate:
   virtual void InfoBarDismissed() OVERRIDE;
   virtual int GetIconID() const OVERRIDE;
   virtual Type GetInfoBarType() const OVERRIDE;
   virtual MediaStreamInfoBarDelegate* AsMediaStreamInfoBarDelegate() OVERRIDE;
   virtual string16 GetMessageText() const OVERRIDE;
   virtual string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
   virtual bool Accept() OVERRIDE;
   virtual bool Cancel() OVERRIDE;
   virtual string16 GetLinkText() const OVERRIDE;
   virtual bool LinkClicked(WindowOpenDisposition disposition) OVERRIDE;
 
   scoped_ptr<MediaStreamDevicesController> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_STREAM_INFOBAR_DELEGATE_H_