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

chrome/browser/extensions/extension_managed_mode_api.cc

Index: chrome/browser/extensions/extension_managed_mode_api.cc
diff --git a/chrome/browser/extensions/extension_managed_mode_api.cc b/chrome/browser/extensions/extension_managed_mode_api.cc
index 11e9f6fede5e2ecf8f0d8aaceec612d003e30fc5..dca13ffa16f1d9a4983091c875a90a7e7fa6437b 100644
--- a/chrome/browser/extensions/extension_managed_mode_api.cc
+++ b/chrome/browser/extensions/extension_managed_mode_api.cc
@@ -58,15 +58,14 @@ void ExtensionManagedModeEventRouter::Observe(
       *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);
+  ListValue* arguments = new ListValue();
+  arguments->Set(0, dict);
+
   ExtensionEventRouter* event_router = profile_->GetExtensionEventRouter();
-  event_router->DispatchEventToRenderers(kChangeEventName, json_args, NULL,
+  event_router->DispatchEventToRenderers(kChangeEventName, arguments, NULL,
                                          GURL(),
                                          extensions::EventFilteringInfo());
 }