[PPAPI] ResourceVar now reference counts its PP_Resource in the plugin.

ppapi/proxy/plugin_var_tracker.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/plugin_var_tracker.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
 #include "ppapi/c/dev/ppp_class_deprecated.h"
 #include "ppapi/c/ppb_var.h"
 #include "ppapi/proxy/plugin_array_buffer_var.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
+#include "ppapi/proxy/plugin_resource_var.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/proxy_object_var.h"
 #include "ppapi/shared_impl/api_id.h"
+#include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/proxy_lock.h"
+#include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/shared_impl/var.h"
 
 namespace ppapi {
 namespace proxy {
 
 PluginVarTracker::HostVar::HostVar(PluginDispatcher* d, int32 i)
     : dispatcher(d),
       host_object_id(i) {
 }
 
@@ skipping 117 matching lines @@
       HostVar(dispatcher, static_cast<int32>(host_object.value.as_id)));
   if (found == host_var_to_plugin_var_.end()) {
     NOTREACHED();
     return;
   }
 
   // Now just release the object given the plugin var ID.
   ReleaseVar(found->second);
 }
 
+ResourceVar* PluginVarTracker::MakeResourceVar(PP_Resource pp_resource) {
+  ResourceTracker* resource_tracker = PpapiGlobals::Get()->GetResourceTracker();
+  ppapi::Resource* resource = resource_tracker->GetResource(pp_resource);
+  if (!resource)
+    return NULL;
+  return new PluginResourceVar(resource);
+}
+
 void PluginVarTracker::DidDeleteInstance(PP_Instance instance) {
   // Calling the destructors on plugin objects may in turn release other
   // objects which will mutate the map out from under us. So do a two-step
   // process of identifying the ones to delete, and then delete them.
   //
   // See the comment above user_data_to_plugin_ in the header file. We assume
   // there aren't that many objects so a brute-force search is reasonable.
   std::vector<void*> user_data_to_delete;
   for (UserDataToPluginImplementedVarMap::const_iterator i =
            user_data_to_plugin_.begin();
@@ skipping 237 matching lines @@
     int id,
     PP_Instance instance,
     base::SharedMemoryHandle* handle,
     uint32* size_in_bytes) {
   NOTREACHED();
   return false;
 }
 
 }  // namesace proxy
 }  // namespace ppapi