Convert //ppapi to use std::unique_ptr

ppapi/proxy/ppb_instance_proxy.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 "ppapi/proxy/ppb_instance_proxy.h"
 
 #include <utility>
 
 #include "base/memory/ref_counted.h"
 #include "base/numerics/safe_conversions.h"
@@ skipping 769 matching lines @@
     PP_Instance instance,
     void* user_data,
     const PPP_MessageHandler_0_2* handler,
     PP_Resource message_loop) {
   InstanceData* data =
       static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
   if (!data)
     return PP_ERROR_BADARGUMENT;
 
   int32_t result = PP_ERROR_FAILED;
-  scoped_ptr<MessageHandler> message_handler = MessageHandler::Create(
+  std::unique_ptr<MessageHandler> message_handler = MessageHandler::Create(
       instance, handler, user_data, message_loop, &result);
   if (message_handler)
     data->message_handler = std::move(message_handler);
   return result;
 }
 
 void PPB_Instance_Proxy::UnregisterMessageHandler(PP_Instance instance) {
   InstanceData* data =
       static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
   if (!data)
@@ skipping 664 matching lines @@
     PP_Instance instance) {
   InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
       GetInstanceData(instance);
   if (!data)
     return;  // Instance was probably deleted.
   data->should_do_request_surrounding_text = false;
 }
 
 }  // namespace proxy
 }  // namespace ppapi