Convert //extensions/renderer from scoped_ptr to std::unique_ptr

extensions/renderer/app_window_custom_bindings.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 "extensions/renderer/app_window_custom_bindings.h"
 
 #include "base/command_line.h"
 #include "content/public/child/v8_value_converter.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
@@ skipping 54 matching lines @@
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(args.Length(), 0);
 
   v8::Local<v8::Value> result = v8::String::Empty(args.GetIsolate());
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableAppWindowControls)) {
     base::StringValue value(
         ResourceBundle::GetSharedInstance()
             .GetRawDataResource(IDR_WINDOW_CONTROLS_TEMPLATE_HTML)
             .as_string());
-    scoped_ptr<content::V8ValueConverter> converter(
+    std::unique_ptr<content::V8ValueConverter> converter(
         content::V8ValueConverter::create());
     result = converter->ToV8Value(&value, context()->v8_context());
   }
   args.GetReturnValue().Set(result);
 }
 
 }  // namespace extensions