Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/extension_page_capture_api.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/extensions/extension_page_capture_api.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
@@ skipping 155 matching lines @@
   if (!web_contents || !render_view_host()) {
     ReturnFailure(kTabClosedError);
     return;
   }
 
   int child_id = render_view_host()->GetProcess()->GetID();
   ChildProcessSecurityPolicy::GetInstance()->GrantReadFile(
       child_id, mhtml_path_);
 
   DictionaryValue* dict = new DictionaryValue();
-  result_.reset(dict);
+  SetResult(dict);
   dict->SetString("mhtmlFilePath", mhtml_path_.value());
   dict->SetInteger("mhtmlFileLength", file_size);
 
   SendResponse(true);
 
   // Note that we'll wait for a response ack message received in
   // OnMessageReceivedFromRenderView before we call Release() (to prevent the
   // blob file from being deleted).
 }
 
 WebContents* PageCaptureSaveAsMHTMLFunction::GetWebContents() {
   Browser* browser = NULL;
   TabContents* tab_contents = NULL;
 
   if (!ExtensionTabUtil::GetTabById(tab_id_, profile(), include_incognito(),
       &browser, NULL, &tab_contents, NULL)) {
     return NULL;
   }
   return tab_contents->web_contents();
 }