Revert of Added SyncToken command buffer trait to help with IPC messages.

gpu/ipc/gpu_command_buffer_traits.cc

Index: gpu/ipc/gpu_command_buffer_traits.cc
diff --git a/gpu/ipc/gpu_command_buffer_traits.cc b/gpu/ipc/gpu_command_buffer_traits.cc
index 9613aa1059febd43c400532ac7231c2b0d03a6b9..8d2148de0f7842d9741cbb61ba6fed3f18450810 100644
--- a/gpu/ipc/gpu_command_buffer_traits.cc
+++ b/gpu/ipc/gpu_command_buffer_traits.cc
@@ -5,7 +5,6 @@
 #include "gpu/ipc/gpu_command_buffer_traits.h"
 
 #include "gpu/command_buffer/common/mailbox_holder.h"
-#include "gpu/command_buffer/common/sync_token.h"
 #include "gpu/command_buffer/common/value_state.h"
 
 // Generate param traits write methods.
@@ -54,29 +53,6 @@
 void ParamTraits<gpu::CommandBuffer::State> ::Log(const param_type& p,
                                                   std::string* l) {
   l->append("<CommandBuffer::State>");
-}
-
-void ParamTraits<gpu::SyncToken>::Write(Message* m, const param_type& p) {
-  m->WriteBytes(p.data, sizeof(p.data));
-}
-
-bool ParamTraits<gpu::SyncToken> ::Read(const Message* m,
-                                      base::PickleIterator* iter,
-                                      param_type* p) {
-  const char* bytes = NULL;
-  if (!iter->ReadBytes(&bytes, sizeof(p->data)))
-    return false;
-  DCHECK(bytes);
-  memcpy(p->data, bytes, sizeof(p->data));
-  return true;
-}
-
-void ParamTraits<gpu::SyncToken>::Log(const param_type& p, std::string* l) {
-  *l += base::StringPrintf(
-      "[%d:%llX] %llu",
-      static_cast<int>(p.GetNamespaceId()),
-      static_cast<unsigned long long>(p.GetCommandBufferId()),
-      static_cast<unsigned long long>(p.GetReleaseCount()));
 }
 
 void ParamTraits<gpu::Mailbox>::Write(Message* m, const param_type& p) {