Move gpu hash_tables and atomicops stuff

gpu/command_buffer/client/hash_tables.h

Index: gpu/command_buffer/client/hash_tables.h
diff --git a/gpu/command_buffer/client/hash_tables.h b/gpu/command_buffer/client/hash_tables.h
new file mode 100644
index 0000000000000000000000000000000000000000..33872bd6998166664cd43826c67f38454c21558f
--- /dev/null
+++ b/gpu/command_buffer/client/hash_tables.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2012 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.
+
+#ifndef GPU_COMMAND_BUFFER_CLIENT_HASH_TABLES_H_
+#define GPU_COMMAND_BUFFER_CLIENT_HASH_TABLES_H_
+
+#if defined(__native_client__)
+#include <tr1/unordered_map>
+namespace gpu {
+template <typename key, typename value>
+struct hash_map : public std::tr1::unordered_map<key, value> {
+};
+}
+#else
+#include "base/hash_tables.h"
+namespace gpu {
+template <typename key, typename value>
+struct hash_map : public base::hash_map<key, value> {
+};
+}
+#endif
+
+#endif  // GPU_COMMAND_BUFFER_CLIENT_HASH_TABLES_H_