Add support for ManagedMemoryPolicy (de)serialization

cc/proto/gpu_conversions.h

+// Copyright 2015 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 CC_PROTO_GPU_CONVERSIONS_H_
+#define CC_PROTO_GPU_CONVERSIONS_H_
+
+#include "cc/base/cc_export.h"
+#include "cc/proto/memory_allocation.pb.h"
+#include "gpu/command_buffer/common/gpu_memory_allocation.h"
+
+namespace cc {
+
+// TODO(dtrainor): Move these to a class and make them static
+// (crbug.com/548432).
+CC_EXPORT proto::MemoryAllocation::PriorityCutoff
+MemoryAllocationPriorityCutoffToProto(
+    const gpu::MemoryAllocation::PriorityCutoff& priority_cutoff);
+CC_EXPORT gpu::MemoryAllocation::PriorityCutoff
+MemoryAllocationPriorityCutoffFromProto(
+    const proto::MemoryAllocation::PriorityCutoff& proto);
+
+}  // namespace cc
+
+#endif  // CC_PROTO_GPU_CONVERSIONS_H_