Refactor media stream infobar delegate code and also fix a typo

chrome/browser/chrome_content_browser_client.cc

 // 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.
 
 #include "chrome/browser/chrome_content_browser_client.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 1111 matching lines @@
   }
 
   TabContentsWrapper* tab =
       TabContentsWrapper::GetCurrentWrapperForContents(contents);
   DCHECK(tab);
 
   InfoBarTabHelper* infobar_helper = tab->infobar_tab_helper();
   InfoBarDelegate* old_infobar = NULL;
   for (size_t i = 0; i < infobar_helper->infobar_count() && !old_infobar; ++i) {
     old_infobar =
-        infobar_helper->GetInfoBarDelegateAt(i)->AsMediaStreamInfobarDelegate();
+        infobar_helper->GetInfoBarDelegateAt(i)->AsMediaStreamInfoBarDelegate();
   }
 
 #if defined(TOOLKIT_VIEWS) || defined(OS_LINUX)
   InfoBarDelegate* infobar = new MediaStreamInfoBarDelegate(infobar_helper,
                                                             request,
                                                             callback);
   if (old_infobar)
     infobar_helper->ReplaceInfoBar(old_infobar, infobar);
   else
     infobar_helper->AddInfoBar(infobar);
@@ skipping 488 matching lines @@
 #if defined(USE_NSS)
 crypto::CryptoModuleBlockingPasswordDelegate*
     ChromeContentBrowserClient::GetCryptoPasswordDelegate(
         const GURL& url) {
   return browser::NewCryptoModuleBlockingDialogDelegate(
       browser::kCryptoModulePasswordKeygen, url.host());
 }
 #endif
 
 }  // namespace chrome