Get rid of the relative paths in command_buffer client/common

gpu/command_buffer/common/mailbox.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "../common/mailbox.h"
+#include "gpu/command_buffer/common/mailbox.h"
 
 #include <string.h>
 
-#include "../common/logging.h"
+#include "gpu/command_buffer/common/logging.h"
 
 namespace gpu {
 
 Mailbox::Mailbox() {
   memset(name, 0, sizeof(name));
 }
 
 bool Mailbox::IsZero() const {
   for (size_t i = 0; i < arraysize(name); ++i) {
     if (name[i])
       return false;
   }
   return true;
 }
 
 void Mailbox::SetName(const int8* n) {
   GPU_DCHECK(IsZero() || !memcmp(name, n, sizeof(name)));
   memcpy(name, n, sizeof(name));
 }
 
 }  // namespace gpu