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

chrome/browser/dom_ui/dom_ui.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/dom_ui/dom_ui.h"
 
 #include "app/l10n_util.h"
 #include "base/json_reader.h"
 #include "base/json_writer.h"
 #include "base/stl_util-inl.h"
@@ skipping 17 matching lines @@
 
 DOMUI::~DOMUI() {
   STLDeleteContainerPairSecondPointers(message_callbacks_.begin(),
                                        message_callbacks_.end());
   STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
 }
 
 // DOMUI, public: -------------------------------------------------------------
 
 void DOMUI::ProcessDOMUIMessage(const std::string& message,
-                                const std::string& content,
+                                const Value* content,
                                 int request_id,
                                 bool has_callback) {
   // Look up the callback for this message.
   MessageCallbackMap::const_iterator callback =
       message_callbacks_.find(message);
   if (callback == message_callbacks_.end())
     return;
 
-  // Convert the content JSON into a Value.
-  scoped_ptr<Value> value;
-  if (!content.empty()) {
-    value.reset(JSONReader::Read(content, false));
-    if (!value.get()) {
-      // The page sent us something that we didn't understand.
-      // This probably indicates a programming error.
-      NOTREACHED();
-      return;
-    }
-  }
-
   // Forward this message and content on.
-  callback->second->Run(value.get());
+  callback->second->Run(content);
 }
 
 void DOMUI::CallJavascriptFunction(const std::wstring& function_name) {
   std::wstring javascript = function_name + L"();";
   ExecuteJavascript(javascript);
 }
 
 void DOMUI::CallJavascriptFunction(const std::wstring& function_name,
                                    const Value& arg) {
   std::string json;
@@ skipping 111 matching lines @@
         list_member->GetType() == Value::TYPE_STRING) {
       const StringValue* string_value =
           static_cast<const StringValue*>(list_member);
       std::wstring wstring_value;
       string_value->GetAsString(&wstring_value);
       return wstring_value;
     }
   }
   return std::wstring();
 }