Move host resource from the proxy to the shared_impl.

This is needed by my new unified resoruce tracker, which will use this file from the shared_impl in the new resource base object.

I fixed up the namespaces for the callers. Longer term, I want to put the
proxy in the ppapi namespace which will eliminate some of this mess.

Review URL: http://codereview.chromium.org/7623018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96678 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ppapi/proxy/ppb_graphics_3d_proxy.cc b/ppapi/proxy/ppb_graphics_3d_proxy.cc
index a82c9a5..1b4d32c7 100644
--- a/ppapi/proxy/ppb_graphics_3d_proxy.cc
+++ b/ppapi/proxy/ppb_graphics_3d_proxy.cc
@@ -13,6 +13,7 @@
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
 
+using ppapi::HostResource;
 using ppapi::thunk::EnterFunctionNoLock;
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_Graphics3D_API;