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

ppapi/shared_impl/resource_var.cc

 // Copyright 2013 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/shared_impl/resource_var.h"
 
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/var_tracker.h"
 
 namespace ppapi {
 
-ResourceVar::ResourceVar() : pp_resource_(0) {}
+// ResourceVar
 
-ResourceVar::ResourceVar(PP_Resource pp_resource) : pp_resource_(pp_resource) {}
-
-ResourceVar::ResourceVar(const IPC::Message& creation_message)
-    : pp_resource_(0),
-      creation_message_(creation_message) {}
-
-ResourceVar::~ResourceVar() {}
-
-bool ResourceVar::IsPending() const {
-  return pp_resource_ == 0 && creation_message_.type() != 0;
+HostResourceVar* ResourceVar::AsHostResourceVar() {
+  return NULL;
 }
 
 ResourceVar* ResourceVar::AsResourceVar() {
   return this;
 }
 
 PP_VarType ResourceVar::GetType() const {
   return PP_VARTYPE_RESOURCE;
 }
 
 // static
 ResourceVar* ResourceVar::FromPPVar(PP_Var var) {
   if (var.type != PP_VARTYPE_RESOURCE)
     return NULL;
   scoped_refptr<Var> var_object(
       PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
   if (!var_object.get())
     return NULL;
   return var_object->AsResourceVar();
 }
 
+ResourceVar::ResourceVar() {}
+
+// HostResourceVar
+
+HostResourceVar::HostResourceVar() : pp_resource_(0) {}
+
+HostResourceVar::HostResourceVar(PP_Resource pp_resource)
+    : pp_resource_(pp_resource) {}
+
+HostResourceVar::HostResourceVar(const IPC::Message& creation_message)
+    : pp_resource_(0),
+      creation_message_(creation_message) {}
+
+HostResourceVar::~HostResourceVar() {}
+
+PP_Resource HostResourceVar::pp_resource() const {
+  return pp_resource_;
+}
+
+bool HostResourceVar::IsPending() const {
+  return pp_resource_ == 0 && creation_message_.type() != 0;
+}
+
+HostResourceVar* HostResourceVar::AsHostResourceVar() {
+  return this;
+}
+
+// PluginResourceVar
+
+PluginResourceVar::PluginResourceVar() : pp_resource_(0) {}
+
+PluginResourceVar::PluginResourceVar(PP_Resource pp_resource)
+    : pp_resource_(pp_resource) {}
+
+PluginResourceVar::~PluginResourceVar() {}
+
+PP_Resource PluginResourceVar::pp_resource() const {
+  return pp_resource_;
+}
+
+bool PluginResourceVar::IsPending() const {
+  return false;
+}
+
 }  // namespace ppapi