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

ppapi/shared_impl/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/shared_impl/var_tracker.h"
 
 #include <string.h>
 
 #include <limits>
 
 #include "base/logging.h"
 #include "base/memory/shared_memory.h"
 #include "ppapi/shared_impl/host_resource.h"
 #include "ppapi/shared_impl/id_assignment.h"
 #include "ppapi/shared_impl/proxy_lock.h"
+#include "ppapi/shared_impl/resource_var.h"
 #include "ppapi/shared_impl/var.h"
 
 namespace ppapi {
 
 VarTracker::VarInfo::VarInfo()
     : var(),
       ref_count(0),
       track_with_no_reference_count(0) {
 }
 
@@ skipping 201 matching lines @@
                                         base::SharedMemoryHandle handle) {
   CheckThreadingPreconditions();
 
   scoped_refptr<ArrayBufferVar> array_buffer(
       CreateShmArrayBuffer(size_in_bytes, handle));
   if (!array_buffer.get())
     return PP_MakeNull();
   return array_buffer->GetPPVar();
 }
 
+PP_Var VarTracker::MakeResourcePPVar(PP_Resource pp_resource) {
+  CheckThreadingPreconditions();
+
+  ResourceVar* resource_var = MakeResourceVar(pp_resource);
+  return resource_var ? resource_var->GetPPVar() : PP_MakeNull();
+}
+
 std::vector<PP_Var> VarTracker::GetLiveVars() {
   CheckThreadingPreconditions();
 
   std::vector<PP_Var> var_vector;
   var_vector.reserve(live_vars_.size());
   for (VarMap::const_iterator iter = live_vars_.begin();
        iter != live_vars_.end();
        ++iter) {
     var_vector.push_back(iter->second.var->GetPPVar());
   }
@@ skipping 12 matching lines @@
 bool VarTracker::DeleteObjectInfoIfNecessary(VarMap::iterator iter) {
   if (iter->second.ref_count != 0 ||
       iter->second.track_with_no_reference_count != 0)
     return false;  // Object still alive.
   iter->second.var->ResetVarID();
   live_vars_.erase(iter);
   return true;
 }
 
 }  // namespace ppapi