Add a new GetInstance() method for singleton classes, take 2.

webkit/glue/plugins/pepper_resource_tracker.cc

Index: webkit/glue/plugins/pepper_resource_tracker.cc
diff --git a/webkit/glue/plugins/pepper_resource_tracker.cc b/webkit/glue/plugins/pepper_resource_tracker.cc
index ba6f8f0aa102458e2d8422a13c7ec7da4f0cf636..f9d24edc2c0c96be46bde900480d39274a2a5482 100644
--- a/webkit/glue/plugins/pepper_resource_tracker.cc
+++ b/webkit/glue/plugins/pepper_resource_tracker.cc
@@ -29,6 +29,11 @@ ResourceTracker::ResourceTracker()
 ResourceTracker::~ResourceTracker() {
 }
 
+// static
+ResourceTracker* ResourceTracker::Get() {
+  return Singleton<ResourceTracker>::get();
+}
+
 PP_Resource ResourceTracker::AddResource(Resource* resource) {
   // If the plugin manages to create 4B resources...
   if (last_id_ == std::numeric_limits<PP_Resource>::max()) {