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

ppapi/shared_impl/test_globals.h

Index: ppapi/shared_impl/test_globals.h
diff --git a/ppapi/shared_impl/test_globals.h b/ppapi/shared_impl/test_globals.h
index 709438ec0991c72028d971b4af391904068634f1..2a0ece302a1743628197155c5bd3288872a78201 100644
--- a/ppapi/shared_impl/test_globals.h
+++ b/ppapi/shared_impl/test_globals.h
@@ -18,6 +18,9 @@ class TestVarTracker : public VarTracker {
  public:
   TestVarTracker() : VarTracker(THREAD_SAFE) {}
   virtual ~TestVarTracker() {}
+  virtual ResourceVar* MakeResourceVar(PP_Resource pp_resource) OVERRIDE {
+    return NULL;
+  }
   virtual ArrayBufferVar* CreateArrayBuffer(uint32 size_in_bytes) OVERRIDE {
     return NULL;
   }