Add support for ManagedMemoryPolicy (de)serialization

cc/output/managed_memory_policy_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/output/managed_memory_policy.h"
+
+#include "cc/proto/managed_memory_policy.pb.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 {
+
+void VerifySerializeAndDeserialize(
+    size_t bytes_limit_when_visible,
+    gpu::MemoryAllocation::PriorityCutoff priority_cutoff_when_visible,
+    size_t num_resources_limit) {
+  ManagedMemoryPolicy policy1(bytes_limit_when_visible,
+                              gpu::MemoryAllocation::CUTOFF_ALLOW_REQUIRED_ONLY,
+                              num_resources_limit);
+  proto::ManagedMemoryPolicy proto;
+  policy1.ToProtobuf(&proto);
+  ManagedMemoryPolicy policy2(1);
+  policy2.FromProtobuf(proto);
+  EXPECT_EQ(policy1, policy2);
+}
+
+TEST(ManagedMemoryPolicyTest, SerializeDeserialize) {
+  VerifySerializeAndDeserialize(
+      42, gpu::MemoryAllocation::CUTOFF_ALLOW_REQUIRED_ONLY, 24);
+  VerifySerializeAndDeserialize(0, gpu::MemoryAllocation::CUTOFF_ALLOW_NOTHING,
+                                1);
+  VerifySerializeAndDeserialize(
+      1, gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE, 0);
+  VerifySerializeAndDeserialize(
+      1024, gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING, 4096);
+}
+
+}  // namespace
+}  // namespace cc