Modify extension request IPC messages to pass a ListValue instead of a string.

chrome/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2009 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/tab_contents/tab_contents.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/file_version_info.h"
 #include "base/process_util.h"
@@ skipping 2190 matching lines @@
   } else {
     OpenURL(url, referrer, disposition, PageTransition::LINK);
   }
 }
 
 void TabContents::DomOperationResponse(const std::string& json_string,
                                        int automation_id) {
 }
 
 void TabContents::ProcessDOMUIMessage(const std::string& message,
-                                      const std::string& content,
+                                      const Value* content,
                                       int request_id,
                                       bool has_callback) {
   if (!render_manager_.dom_ui()) {
     // This can happen if someone uses window.open() to open an extension URL
     // from a non-extension context.
     render_view_host()->BlockExtensionRequest(request_id);
     return;
   }
   render_manager_.dom_ui()->ProcessDOMUIMessage(message, content, request_id,
                                                 has_callback);
@@ skipping 366 matching lines @@
 
     default:
       NOTREACHED();
   }
 }
 
 void TabContents::set_encoding(const std::string& encoding) {
   encoding_ = CharacterEncoding::GetCanonicalEncodingNameByAliasName(encoding);
 }