[App Banner] Use appropriate type parameters for WebCallbacks.

chrome/renderer/banners/app_banner_client.cc

 // Copyright 2015 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/renderer/banners/app_banner_client.h"
 
 #include "chrome/common/render_messages.h"
 #include "ipc/ipc_message.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 
@@ skipping 35 matching lines @@
 
 void AppBannerClient::ResolveEvent(
     int request_id,
     const std::string& platform,
     const blink::WebAppBannerPromptResult::Outcome& outcome) {
   blink::WebAppBannerCallbacks* callbacks =
       banner_callbacks_.Lookup(request_id);
   if (!callbacks)
     return;
 
-  scoped_ptr<blink::WebAppBannerPromptResult> result(
-      new blink::WebAppBannerPromptResult(
-        blink::WebString::fromUTF8(platform),
-        outcome));
-  callbacks->onSuccess(result.release());
+  callbacks->onSuccess(blink::WebAppBannerPromptResult(
+      blink::WebString::fromUTF8(platform), outcome));
   banner_callbacks_.Remove(request_id);
 }
 
 void AppBannerClient::OnBannerAccepted(int request_id,
                                         const std::string& platform) {
   ResolveEvent(request_id, platform,
                blink::WebAppBannerPromptResult::Outcome::Accepted);
 }
 
 void AppBannerClient::OnBannerDismissed(int request_id) {
   ResolveEvent(request_id, "",
                blink::WebAppBannerPromptResult::Outcome::Dismissed);
 }