Add support for ManagedMemoryPolicy (de)serialization

cc/proto/gpu_conversions_unittest.cc

+// 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.
+
+#include "cc/proto/gpu_conversions.h"
+
+#include "cc/proto/memory_allocation.pb.h"
+#include "gpu/command_buffer/common/gpu_memory_allocation.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+TEST(GpuProtoConversionTest,
+     SerializeDeserializeMemoryAllocationPriorityCutoff) {
+  for (size_t i = 0; i < gpu::MemoryAllocation::PriorityCutoff::CUTOFF_LAST;
+       ++i) {
+    gpu::MemoryAllocation::PriorityCutoff priority_cutoff =
+        static_cast<gpu::MemoryAllocation::PriorityCutoff>(i);
+    EXPECT_EQ(priority_cutoff,
+              MemoryAllocationPriorityCutoffFromProto(
+                  MemoryAllocationPriorityCutoffToProto(priority_cutoff)));
+  }
+}
+
+}  // namespace
+}  // namespace cc