Update from https://crrev.com/306655

gpu/command_buffer/common/value_state.h

+// Copyright (c) 2014 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_COMMON_VALUE_STATE_H_
+#define GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_
+
+#include "base/containers/hash_tables.h"
+#include "base/memory/ref_counted.h"
+#include "gpu/gpu_export.h"
+
+namespace gpu {
+
+// Used to maintain Valuebuffer state, exposed to browser to
+// support passing ValueStates via IPC.
+union GPU_EXPORT ValueState {
+  float float_value[4];
+  int int_value[4];
+};
+
+// Refcounted wrapper for a hash_map of subscription targets to ValueStates
+class GPU_EXPORT ValueStateMap : public base::RefCounted<ValueStateMap> {
+ public:
+  ValueStateMap();
+
+  // Returns NULL if there is not ValueState for the target
+  const ValueState* GetState(unsigned int target) const;
+
+  void UpdateState(unsigned int target, const ValueState& state);
+
+ protected:
+  virtual ~ValueStateMap();
+
+ private:
+  friend class base::RefCounted<ValueStateMap>;
+
+  typedef base::hash_map<unsigned int, ValueState> Map;
+
+  Map state_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(ValueStateMap);
+};
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_COMMON_VALUE_STATE_H_