Use base::PostTaskAndReplyWithResults() in more places.

chrome/browser/ui/webui/extensions/extension_error_handler.h

 // Copyright 2013 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_EXTENSIONS_EXTENSION_ERROR_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_ERROR_HANDLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 31 matching lines @@
   friend class ManifestHighlightUnitTest;
 
   // Handle the "requestFileSource" call.
   void HandleRequestFileSource(const base::ListValue* args);
   // Handle the "openDevTools" call.
   void HandleOpenDevTools(const base::ListValue* args);
 
   // Populate the results for a manifest file's content in response to the
   // "requestFileSource" call. Highlight the part of the manifest which
   // corresponds to the given |key| and |specific| locations. Caller owns
-  // |dict| and |contents|.
+  // |dict|.
   void GetManifestFileCallback(base::DictionaryValue* dict,
                                const std::string& key,
                                const std::string& specific,
-                               std::string* contents);
+                               const std::string& contents);
 
   // Populate the results for a source file's content in response to the
   // "requestFileSource" call. Highlight the part of the source which
   // corresponds to the given |line_number|.
   void GetSourceFileCallback(base::DictionaryValue* results,
                              int line_number,
-                             std::string* contents);
+                             const std::string& contents);
 
   // The profile with which this Handler is associated.
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionErrorHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_ERROR_HANDLER_H_