gpu: GPU service scheduler.

content/common/gpu_stream_constants.h

Index: content/common/gpu_stream_constants.h
diff --git a/content/common/gpu_stream_constants.h b/content/common/gpu_stream_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..f3b0254aa7aa414dd26d48e2606d81459f2dae29
--- /dev/null
+++ b/content/common/gpu_stream_constants.h
@@ -0,0 +1,26 @@
+// Copyright (c) 2017 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 CONTENT_COMMON_GPU_STREAM_CONSTANTS_H_
+#define CONTENT_COMMON_GPU_STREAM_CONSTANTS_H_
+
+#include "gpu/command_buffer/common/scheduling_priority.h"
+
+namespace content {
+
+enum {
+  kGpuStreamIdDefault,
+  kGpuStreamIdWorker,
+};
+
+const gpu::SchedulingPriority kGpuStreamPriorityDefault =
+    gpu::SchedulingPriority::kNormal;
+const gpu::SchedulingPriority kGpuStreamPriorityUI =
+    gpu::SchedulingPriority::kHighest;
+const gpu::SchedulingPriority kGpuStreamPriorityWorker =
+    gpu::SchedulingPriority::kLowest;
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_STREAM_CONSTANTS_H_