Add support for ManagedMemoryPolicy (de)serialization

cc/proto/gpu_conversions.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 "base/logging.h"
+#include "cc/proto/memory_allocation.pb.h"
+#include "gpu/command_buffer/common/gpu_memory_allocation.h"
+
+namespace cc {
+
+proto::MemoryAllocation::PriorityCutoff MemoryAllocationPriorityCutoffToProto(
+    const gpu::MemoryAllocation::PriorityCutoff& priority_cutoff) {
+  switch (priority_cutoff) {
+    case gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_NOTHING:
+      return proto::MemoryAllocation_PriorityCutoff_ALLOW_NOTHING;
+    case gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_REQUIRED_ONLY:
+      return proto::MemoryAllocation_PriorityCutoff_ALLOW_REQUIRED_ONLY;
+    case gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_NICE_TO_HAVE:
+      return proto::MemoryAllocation_PriorityCutoff_ALLOW_NICE_TO_HAVE;
+    case gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_EVERYTHING:
+      return proto::MemoryAllocation_PriorityCutoff_ALLOW_EVERYTHING;
+  }
+  return proto::MemoryAllocation_PriorityCutoff_UNKNOWN;
+}
+
+gpu::MemoryAllocation::PriorityCutoff MemoryAllocationPriorityCutoffFromProto(
+    const proto::MemoryAllocation::PriorityCutoff& priority_cutoff) {
+  switch (priority_cutoff) {
+    case proto::MemoryAllocation_PriorityCutoff_ALLOW_NOTHING:
+      return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_NOTHING;
+    case proto::MemoryAllocation_PriorityCutoff_ALLOW_REQUIRED_ONLY:
+      return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_REQUIRED_ONLY;
+    case proto::MemoryAllocation_PriorityCutoff_ALLOW_NICE_TO_HAVE:
+      return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_NICE_TO_HAVE;
+    case proto::MemoryAllocation_PriorityCutoff_ALLOW_EVERYTHING:
+      return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_EVERYTHING;
+    case proto::MemoryAllocation_PriorityCutoff_UNKNOWN:
+      NOTREACHED() << "Received MemoryAllocation::PriorityCutoff_UNKNOWN";
+      return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_LAST;
+  }
+  return gpu::MemoryAllocation::PriorityCutoff::CUTOFF_ALLOW_NOTHING;
+}
+
+}  // namespace cc