services/ui: Add mojom API for creating/destroying gpu memory buffer.

gpu/ipc/common/surface_handle_struct_traits.h

Index: gpu/ipc/common/surface_handle_struct_traits.h
diff --git a/gpu/ipc/common/surface_handle_struct_traits.h b/gpu/ipc/common/surface_handle_struct_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..188c0daea42adda8d19ccc976b35069f673567d4
--- /dev/null
+++ b/gpu/ipc/common/surface_handle_struct_traits.h
@@ -0,0 +1,37 @@
+// Copyright 2016 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 GPU_IPC_COMMON_SURFACE_HANDLE_STRUCT_TRAITS_H_
+#define GPU_IPC_COMMON_SURFACE_HANDLE_STRUCT_TRAITS_H_
+
+#include "gpu/ipc/common/surface_handle.h"
+#include "gpu/ipc/common/surface_handle.mojom-shared.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<gpu::mojom::SurfaceHandleDataView, gpu::SurfaceHandle> {
+  static uint64_t surface_handle(const gpu::SurfaceHandle& handle) {
+#if defined(OS_WIN)
+    return reinterpret_cast<uint64_t>(handle);
+#else
+    return static_cast<uint64_t>(handle);
+#endif
+  }
+
+  static bool Read(gpu::mojom::SurfaceHandleDataView data,
+                   gpu::SurfaceHandle* out) {
+    uint64_t handle = data.surface_handle();
+#if defined(OS_WIN)
+    *out = reinterpret_cast<gpu::SurfaceHandle>(handle);
+#else
+    *out = static_cast<gpu::SurfaceHandle>(handle);
+#endif
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // GPU_IPC_COMMON_SURFACE_HANDLE_STRUCT_TRAITS_H_