Convert the PluginResource to be refcounted.

This is to make the future transition to a shared resource tracker (which
will use refcounted resources) easier. There should be no behavior change.

Review URL: http://codereview.chromium.org/7608030

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96324 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ppapi/proxy/ppb_graphics_3d_proxy.cc b/ppapi/proxy/ppb_graphics_3d_proxy.cc
index 11250d9..a82c9a5 100644
--- a/ppapi/proxy/ppb_graphics_3d_proxy.cc
+++ b/ppapi/proxy/ppb_graphics_3d_proxy.cc
@@ -448,7 +448,7 @@
   if (result.is_null())
     return 0;
 
-  linked_ptr<Graphics3D> graphics_3d(new Graphics3D(result));
+  scoped_refptr<Graphics3D> graphics_3d(new Graphics3D(result));
   if (!graphics_3d->Init())
     return 0;