Convert the PluginResource to be refcounted.

ppapi/proxy/resource_creation_proxy.cc

 // Copyright (c) 2011 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/resource_creation_proxy.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/proxy/host_resource.h"
 #include "ppapi/proxy/interface_id.h"
@@ skipping 140 matching lines @@
     PP_Instance instance) {
   return PPB_Flash_TCPSocket_Proxy::CreateProxyResource(instance);
 }
 
 PP_Resource ResourceCreationProxy::CreateFontObject(
     PP_Instance instance,
     const PP_FontDescription_Dev* description) {
   if (!ppapi::FontImpl::IsPPFontDescriptionValid(*description))
     return 0;
 
-  linked_ptr<Font> object(new Font(HostResource::MakeInstanceOnly(instance),
-                                   *description));
-  return PluginResourceTracker::GetInstance()->AddResource(object);
+  return PluginResourceTracker::GetInstance()->AddResource(
+      new Font(HostResource::MakeInstanceOnly(instance), *description));
 }
 
 PP_Resource ResourceCreationProxy::CreateGraphics2D(PP_Instance instance,
                                                     const PP_Size& size,
                                                     PP_Bool is_always_opaque) {
   return PPB_Graphics2D_Proxy::CreateProxyResource(instance, size,
                                                    is_always_opaque);
 }
 
 PP_Resource ResourceCreationProxy::CreateImageData(PP_Instance instance,
@@ skipping 11 matching lines @@
       INTERFACE_ID_RESOURCE_CREATION, instance, format, size, init_to_zero,
       &result, &image_data_desc, &image_handle));
 
   if (result.is_null() || image_data_desc.size() != sizeof(PP_ImageDataDesc))
     return 0;
 
   // We serialize the PP_ImageDataDesc just by copying to a string.
   PP_ImageDataDesc desc;
   memcpy(&desc, image_data_desc.data(), sizeof(PP_ImageDataDesc));
 
-  linked_ptr<ImageData> object(new ImageData(result, desc, image_handle));
-  return PluginResourceTracker::GetInstance()->AddResource(object);
+  return PluginResourceTracker::GetInstance()->AddResource(
+      new ImageData(result, desc, image_handle));
 }
 
 PP_Resource ResourceCreationProxy::CreateKeyboardInputEvent(
     PP_Instance instance,
     PP_InputEvent_Type type,
     PP_TimeTicks time_stamp,
     uint32_t modifiers,
     uint32_t key_code,
     struct PP_Var character_text) {
   if (type != PP_INPUTEVENT_TYPE_RAWKEYDOWN &&
@@ skipping 196 matching lines @@
       *result_image_handle = dispatcher_->ShareHandleWithRemote(ih, false);
 #else
       *result_image_handle = ImageData::HandleFromInt(handle);
 #endif
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace pp