Removed implementation of CHROMIUM_subscribe_uniform

gpu/ipc/common/gpu_command_buffer_traits.h

Index: gpu/ipc/common/gpu_command_buffer_traits.h
diff --git a/gpu/ipc/common/gpu_command_buffer_traits.h b/gpu/ipc/common/gpu_command_buffer_traits.h
index 1bf5314eb506464fcac3e95a92b36e0b933a60fb..24a69c0d29ab9cfdfc7faf032998136014eb4186 100644
--- a/gpu/ipc/common/gpu_command_buffer_traits.h
+++ b/gpu/ipc/common/gpu_command_buffer_traits.h
@@ -15,7 +15,6 @@ namespace gpu {
 struct Mailbox;
 struct MailboxHolder;
 struct SyncToken;
-union ValueState;
 }
 
 namespace IPC {
@@ -64,17 +63,6 @@ struct GPU_EXPORT ParamTraits<gpu::MailboxHolder> {
   static void Log(const param_type& p, std::string* l);
 };
 
-template <>
-struct GPU_EXPORT ParamTraits<gpu::ValueState> {
-  typedef gpu::ValueState param_type;
-  static void GetSize(base::PickleSizer* s, const param_type& p);
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m,
-                   base::PickleIterator* iter,
-                   param_type* p);
-  static void Log(const param_type& p, std::string* l);
-};
-
 }  // namespace IPC
 
 #endif  // GPU_IPC_GPU_PARAM_TRAITS_H_