Use C bindings to Mojo GL entry points exclusively.

mojo/gpu/mojo_context_support.h

-// 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.
-
-#ifndef MOJO_GPU_MOJO_CONTEXT_SUPPORT_H_
-#define MOJO_GPU_MOJO_CONTEXT_SUPPORT_H_
-
-#include <MGL/mgl.h>
-
-#include "base/macros.h"
-#include "gpu/command_buffer/client/context_support.h"
-
-namespace mojo {
-
-class MojoContextSupport : public gpu::ContextSupport {
- public:
-  explicit MojoContextSupport(MGLContext context);
-  ~MojoContextSupport() override;
-
-  // gpu::ContextSupport implementation.
-  void SignalSyncPoint(uint32 sync_point,
-                       const base::Closure& callback) override;
-  void SignalQuery(uint32 query, const base::Closure& callback) override;
-  void SetSurfaceVisible(bool visible) override;
-  void Swap() override;
-  void PartialSwapBuffers(const gfx::Rect& sub_buffer) override;
-  void ScheduleOverlayPlane(int plane_z_order,
-                            gfx::OverlayTransform plane_transform,
-                            unsigned overlay_texture_id,
-                            const gfx::Rect& display_bounds,
-                            const gfx::RectF& uv_rect) override;
-  uint32 InsertFutureSyncPointCHROMIUM() override;
-  void RetireSyncPointCHROMIUM(uint32 sync_point) override;
-
- private:
-  MGLContext context_;
-  DISALLOW_COPY_AND_ASSIGN(MojoContextSupport);
-};
-}
-
-#endif  // MOJO_GPU_MOJO_CONTEXT_SUPPORT_H_