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

chrome/browser/chromeos/extensions/input_method_event_router.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 "input_method_event_router.h"
 
 #include <algorithm>
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
@@ skipping 22 matching lines @@
 
 void ExtensionInputMethodEventRouter::InputMethodChanged(
     input_method::InputMethodManager *manager,
     bool show_message) {
   Profile *profile = ProfileManager::GetDefaultProfile();
   extensions::EventRouter *router = profile->GetExtensionEventRouter();
 
   if (!router->HasEventListener(extensions::event_names::kOnInputMethodChanged))
     return;
 
-  ListValue args;
+  scoped_ptr<ListValue> args(new ListValue());
   StringValue *input_method_name = new StringValue(
       GetInputMethodForXkb(manager->GetCurrentInputMethod().id()));
-  args.Append(input_method_name);
-  std::string args_json;
-  base::JSONWriter::Write(&args, &args_json);
+  args->Append(input_method_name);
 
   // The router will only send the event to extensions that are listening.
   router->DispatchEventToRenderers(
-      extensions::event_names::kOnInputMethodChanged,
-      args_json, profile, GURL());
+      extensions::event_names::kOnInputMethodChanged, args.Pass(), profile,
+      GURL());
 }
 
 std::string ExtensionInputMethodEventRouter::GetInputMethodForXkb(
     const std::string& xkb_id) {
   size_t prefix_length = std::string(kXkbPrefix).length();
   DCHECK(xkb_id.substr(0, prefix_length) == kXkbPrefix);
   return xkb_id.substr(prefix_length);
 }
 
 }  // namespace chromeos