Move Mailbox from cc to gpu, and its traits to gpu/ipc

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 b502b0fd1bb4c36660fbc2cd21d2a9fe38913b0b..d9fc17d166070026a45c915f5a68b5b6ff5227c2 100644
--- a/gpu/ipc/gpu_command_buffer_traits.cc
+++ b/gpu/ipc/gpu_command_buffer_traits.cc
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 #include "gpu/ipc/gpu_command_buffer_traits.h"
+#include "gpu/command_buffer/common/mailbox.h"
 
 namespace IPC {
 
@@ -38,4 +39,25 @@ void ParamTraits<gpu::CommandBuffer::State> ::Log(const param_type& p,
   l->append("<CommandBuffer::State>");
 }
 
+void ParamTraits<gpu::Mailbox>::Write(Message* m, const param_type& p) {
+  m->WriteBytes(p.name, sizeof(p.name));
+}
+
+bool ParamTraits<gpu::Mailbox>::Read(const Message* m,
+                                     PickleIterator* iter,
+                                     param_type* p) {
+  const char* bytes = NULL;
+  if (!m->ReadBytes(iter, &bytes, sizeof(p->name)))
+    return false;
+  DCHECK(bytes);
+  memcpy(p->name, bytes, sizeof(p->name));
+  return true;
+}
+
+void ParamTraits<gpu::Mailbox>::Log(const param_type& p, std::string* l) {
+  for (size_t i = 0; i < sizeof(p.name); ++i)
+    *l += base::StringPrintf("%02x", p.name[i]);
+}
+
+
 }  // namespace IPC