Convert the PluginResource to be refcounted.

ppapi/proxy/plugin_resource_tracker.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/plugin_resource_tracker.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 12 matching lines @@
 
 ::ppapi::TrackerBase* GetTrackerBase() {
   return PluginResourceTracker::GetInstance();
 }
 
 }  // namespace
 
 PluginResourceTracker::ResourceInfo::ResourceInfo() : ref_count(0) {
 }
 
-PluginResourceTracker::ResourceInfo::ResourceInfo(int rc,
-                                                  linked_ptr<PluginResource> r)
+PluginResourceTracker::ResourceInfo::ResourceInfo(int rc, PluginResource* r)
     : ref_count(rc),
       resource(r) {
 }
 
 PluginResourceTracker::ResourceInfo::ResourceInfo(const ResourceInfo& other)
     : ref_count(other.ref_count),
       resource(other.resource) {
   // Wire up the new shared resource tracker base to use our implementation.
   ::ppapi::TrackerBase::Init(&GetTrackerBase);
 }
@@ skipping 38 matching lines @@
 }
 
 PluginResource* PluginResourceTracker::GetResourceObject(
     PP_Resource pp_resource) {
   ResourceMap::iterator found = resource_map_.find(pp_resource);
   if (found == resource_map_.end())
     return NULL;
   return found->second.resource.get();
 }
 
-PP_Resource PluginResourceTracker::AddResource(
-    linked_ptr<PluginResource> object) {
+PP_Resource PluginResourceTracker::AddResource(PluginResource* object) {
   PP_Resource plugin_resource = ++last_resource_id_;
   DCHECK(resource_map_.find(plugin_resource) == resource_map_.end());
   resource_map_[plugin_resource] = ResourceInfo(1, object);
   if (!object->host_resource().is_null()) {
     // The host resource ID will be 0 for resources that only exist in the
     // plugin process. Don't add those to the list.
     host_resource_map_[object->host_resource()] = plugin_resource;
   }
   return plugin_resource;
 }
@@ skipping 52 matching lines @@
     const PP_Resource& resource,
     bool notify_browser_on_release) {
   ResourceMap::iterator found = resource_map_.find(resource);
   if (found == resource_map_.end())
     return;
   found->second.ref_count--;
   if (found->second.ref_count == 0) {
     // Keep a reference while removing in case the destructor ends up
     // re-entering. That way, when the destructor is called, it's out of the
     // maps.
-    linked_ptr<PluginResource> plugin_resource = found->second.resource;
+    scoped_refptr<PluginResource> plugin_resource = found->second.resource;
     PluginDispatcher* dispatcher =
         PluginDispatcher::GetForInstance(plugin_resource->instance());
     HostResource host_resource = plugin_resource->host_resource();
     if (!host_resource.is_null())
       host_resource_map_.erase(host_resource);
     resource_map_.erase(found);
-    plugin_resource.reset();
+    plugin_resource = NULL;
 
     // dispatcher can be NULL if the plugin held on to a resource after the
     // instance was destroyed. In that case the browser-side resource has
     // already been freed correctly on the browser side. The host_resource
     // will be NULL for proxy-only resources, which we obviously don't need to
     // tell the host about.
     if (notify_browser_on_release && dispatcher && !host_resource.is_null()) {
       dispatcher->Send(new PpapiHostMsg_PPBCore_ReleaseResource(
           INTERFACE_ID_PPB_CORE, host_resource));
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace pp