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

content/renderer/pepper/host_var_tracker.cc

Index: content/renderer/pepper/host_var_tracker.cc
diff --git a/content/renderer/pepper/host_var_tracker.cc b/content/renderer/pepper/host_var_tracker.cc
index 71a568ace7bf63f3d2e9a75072a8e2a79ea5e28a..ed67dbaa616b0487a2e512d407e0d5e68a4f4c94 100644
--- a/content/renderer/pepper/host_var_tracker.cc
+++ b/content/renderer/pepper/host_var_tracker.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "content/renderer/pepper/host_array_buffer_var.h"
+#include "content/renderer/pepper/host_resource_var.h"
 #include "content/renderer/pepper/npobject_var.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "ppapi/c/pp_var.h"
@@ -102,6 +103,10 @@ int HostVarTracker::GetLiveNPObjectVarsForInstance(PP_Instance instance) const {
   return static_cast<int>(found->second->size());
 }
 
+ppapi::ResourceVar* HostVarTracker::MakeResourceVar(PP_Resource pp_resource) {
+  return new HostResourceVar(pp_resource);
+}
+
 void HostVarTracker::DidDeleteInstance(PP_Instance instance) {
   CheckThreadingPreconditions();