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

chrome/browser/extensions/permissions_updater.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/permissions_updater.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/ref_counted.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/permissions/permissions_api_helpers.h"
@@ skipping 99 matching lines @@
   flow->FireAndForget();
 }
 
 void PermissionsUpdater::DispatchEvent(
     const std::string& extension_id,
     const char* event_name,
     const PermissionSet* changed_permissions) {
   if (!profile_ || !profile_->GetExtensionEventRouter())
     return;
 
-  ListValue value;
+  scoped_ptr<ListValue> value(new ListValue());
   scoped_ptr<api::permissions::Permissions> permissions =
     PackPermissionSet(changed_permissions);
-  value.Append(permissions->ToValue().release());
-  std::string json_value;
-  base::JSONWriter::Write(&value, &json_value);
+  value->Append(permissions->ToValue().release());
   profile_->GetExtensionEventRouter()->DispatchEventToExtension(
-      extension_id, event_name, json_value, profile_, GURL());
+      extension_id, event_name, value.Pass(), profile_, GURL());
 }
 
 void PermissionsUpdater::NotifyPermissionsUpdated(
     EventType event_type,
     const Extension* extension,
     const PermissionSet* changed) {
   if (!changed || changed->IsEmpty())
     return;
 
   UpdatedExtensionPermissionsInfo::Reason reason;
@@ skipping 32 matching lines @@
 
   // Trigger the onAdded and onRemoved events in the extension.
   DispatchEvent(extension->id(), event_name, changed);
 }
 
 ExtensionPrefs* PermissionsUpdater::GetExtensionPrefs() {
   return profile_->GetExtensionService()->extension_prefs();
 }
 
 }  // namespace extensions