Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/resource_tracker_unittest.cc

 // Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
 
 #include "base/compiler_specific.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/shared_impl/test_globals.h"
 
 namespace ppapi {
 
 namespace {
 
 int mock_resource_alive_count = 0;
 int last_plugin_ref_was_deleted_count = 0;
 int instance_was_deleted_count = 0;
 
 class MyMockResource : public Resource {
  public:
-  MyMockResource(PP_Instance instance) : Resource(instance) {
+  MyMockResource(PP_Instance instance) : Resource(OBJECT_IS_IMPL, instance) {
     mock_resource_alive_count++;
   }
   virtual ~MyMockResource() {
     mock_resource_alive_count--;
   }
 
   virtual void LastPluginRefWasDeleted() OVERRIDE {
     Resource::LastPluginRefWasDeleted();
     last_plugin_ref_was_deleted_count++;
   }
@@ skipping 82 matching lines @@
   EXPECT_EQ(1, mock_resource_alive_count);
   EXPECT_EQ(1, last_plugin_ref_was_deleted_count);
   EXPECT_EQ(1, instance_was_deleted_count);
   EXPECT_EQ(0, resource->pp_instance());
 
   resource = NULL;
   EXPECT_EQ(0, mock_resource_alive_count);
 }
 
 }  // namespace ppapi