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

chrome/browser/extensions/api/cookies/cookies_api.cc

Index: chrome/browser/extensions/api/cookies/cookies_api.cc
diff --git a/chrome/browser/extensions/api/cookies/cookies_api.cc b/chrome/browser/extensions/api/cookies/cookies_api.cc
index e2cb2b0f6bbf8cc6f3cb64a5f8c3b64136f487f4..278e228ec35ff2d6c6fe9895cc5fc5152b59c8d8 100644
--- a/chrome/browser/extensions/api/cookies/cookies_api.cc
+++ b/chrome/browser/extensions/api/cookies/cookies_api.cc
@@ -64,7 +64,7 @@ void ExtensionCookiesEventRouter::Observe(
 void ExtensionCookiesEventRouter::CookieChanged(
     Profile* profile,
     ChromeCookieDetails* details) {
-  ListValue args;
+  ListValue* args = new ListValue();
   DictionaryValue* dict = new DictionaryValue();
   dict->SetBoolean(keys::kRemovedKey, details->removed);
   dict->Set(
@@ -100,22 +100,20 @@ void ExtensionCookiesEventRouter::CookieChanged(
   }
   dict->SetString(keys::kCauseKey, cause);
 
-  args.Append(dict);
+  args->Append(dict);
 
-  std::string json_args;
-  base::JSONWriter::Write(&args, &json_args);
   GURL cookie_domain =
       cookies_helpers::GetURLFromCanonicalCookie(*details->cookie);
-  DispatchEvent(profile, keys::kOnChanged, json_args, cookie_domain);
+  DispatchEvent(profile, keys::kOnChanged, args, cookie_domain);
 }
 
 void ExtensionCookiesEventRouter::DispatchEvent(Profile* profile,
                                                 const char* event_name,
-                                                const std::string& json_args,
+                                                ListValue* event_args,
                                                 GURL& cookie_domain) {
   if (profile && profile->GetExtensionEventRouter()) {
     profile->GetExtensionEventRouter()->DispatchEventToRenderers(
-        event_name, json_args, profile, cookie_domain);
+        event_name, event_args, profile, cookie_domain);
   }
 }