Add a unified resource tracker shared between the proxy and the impl.

ppapi/proxy/plugin_resource_tracker_unittest.cc

Index: ppapi/proxy/plugin_resource_tracker_unittest.cc
diff --git a/ppapi/proxy/plugin_resource_tracker_unittest.cc b/ppapi/proxy/plugin_resource_tracker_unittest.cc
index 8295302d54bff22f3e4f53331f864345d9b5a14a..cb2663802abe4adf0d87ebc2920a541508a5a81e 100644
--- a/ppapi/proxy/plugin_resource_tracker_unittest.cc
+++ b/ppapi/proxy/plugin_resource_tracker_unittest.cc
@@ -39,11 +39,6 @@ class PluginResourceTrackerTest : public PluginProxyTest {
  public:
   PluginResourceTrackerTest() {}
   ~PluginResourceTrackerTest() {}
-
-  PluginResourceTracker& tracker() { return tracker_; }
-
- private:
-  PluginResourceTracker tracker_;
 };
 
 TEST_F(PluginResourceTrackerTest, PluginResourceForHostResource) {
@@ -53,22 +48,22 @@ TEST_F(PluginResourceTrackerTest, PluginResourceForHostResource) {
   serialized.SetHostResource(pp_instance(), host_resource);
 
   // When we haven't added an object, the return value should be 0.
-  EXPECT_EQ(0, tracker().PluginResourceForHostResource(serialized));
+  EXPECT_EQ(0, resource_tracker().PluginResourceForHostResource(serialized));
 
   EXPECT_EQ(0, TrackedMockResource::tracked_alive_count);
   TrackedMockResource* object = new TrackedMockResource(serialized);
   EXPECT_EQ(1, TrackedMockResource::tracked_alive_count);
-  PP_Resource plugin_resource = tracker().AddResource(object);
+  PP_Resource plugin_resource = object->GetReference();
 
   // Now that the object has been added, the return value should be the plugin
   // resource ID we already got.
   EXPECT_EQ(plugin_resource,
-            tracker().PluginResourceForHostResource(serialized));
+            resource_tracker().PluginResourceForHostResource(serialized));
 
   // Releasing the resource should have freed it.
-  tracker().ReleaseResource(plugin_resource);
+  resource_tracker().ReleaseResource(plugin_resource);
   EXPECT_EQ(0, TrackedMockResource::tracked_alive_count);
-  EXPECT_EQ(0, tracker().PluginResourceForHostResource(serialized));
+  EXPECT_EQ(0, resource_tracker().PluginResourceForHostResource(serialized));
 }
 
 }  // namespace proxy