Add gpu targets to untrusted NaCl build.

gpu/command_buffer/client/ref_counted.h

Index: gpu/command_buffer/client/ref_counted.h
===================================================================
--- gpu/command_buffer/client/ref_counted.h	(revision 147456)
+++ gpu/command_buffer/client/ref_counted.h	(working copy)
@@ -5,7 +5,12 @@
 #ifndef GPU_COMMAND_BUFFER_CLIENT_REF_COUNTED_H_
 #define GPU_COMMAND_BUFFER_CLIENT_REF_COUNTED_H_
 
-#if defined(__native_client__)
+// TODO(bbudge) The NaCl SRPC proxy can't depend on base, so we define our own
+// ref_counted. This causes duplicate class warnings in the NaCl IPC proxy,
+// which uses base. Finesse around this by adding '!defined(OS_NACL)', which
+// is false for the SRPC build since it doesn't #include build_config.h. Remove
+// the custom ref_counted class after NaCl has switched proxies.
+#if defined(__native_client__) && !defined(OS_NACL)
 #include "native_client/src/include/ref_counted.h"
 namespace gpu {
 using nacl::RefCountedThreadSafe;