Refactor extension event distribution to use Values instead of JSON strings.

chrome/browser/extensions/api/managed_mode/managed_mode_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.
 
 // Implementation of the Chrome Extensions Managed Mode API.
 
 #include "chrome/browser/extensions/api/managed_mode/managed_mode_api.h"
 
 #include <string>
 
@@ skipping 42 matching lines @@
 
 void ExtensionManagedModeEventRouter::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_PREF_CHANGED, type);
   const std::string& pref_name =
       *content::Details<std::string>(details).ptr();
   DCHECK_EQ(std::string(prefs::kInManagedMode), pref_name);
 
-  ListValue args;
   DictionaryValue* dict = new DictionaryValue();
-  args.Append(dict);
   dict->SetBoolean(extension_preference_api_constants::kValue,
       g_browser_process->local_state()->GetBoolean(prefs::kInManagedMode));
-  std::string json_args;
-  base::JSONWriter::Write(&args, &json_args);
+  scoped_ptr<ListValue> args(new ListValue());
+  args->Set(0, dict);
+
   extensions::EventRouter* event_router = profile_->GetExtensionEventRouter();
-  event_router->DispatchEventToRenderers(kChangeEventName, json_args, NULL,
+  event_router->DispatchEventToRenderers(kChangeEventName, args.Pass(), NULL,
                                          GURL(),
                                          extensions::EventFilteringInfo());
 }
 
 GetManagedModeFunction::~GetManagedModeFunction() { }
 
 bool GetManagedModeFunction::RunImpl() {
   bool in_managed_mode = ManagedMode::IsInManagedMode();
 
   scoped_ptr<DictionaryValue> result(new DictionaryValue);
@@ skipping 42 matching lines @@
   EXTENSION_FUNCTION_VALIDATE(args_->Get(1, &value));
 #if defined(ENABLE_CONFIGURATION_POLICY)
   policy::ManagedModePolicyProvider* policy_provider =
       ManagedModePolicyProviderFactory::GetForProfile(profile_);
   policy_provider->SetPolicy(key, value);
 #endif
   return true;
 }
 
 }  // namespace extensions