Convert Ozone GBM to use new surface API.

ui/ozone/platform/drm/gpu/gbm_surface.h

+// 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 UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_image.h"
+#include "ui/ozone/platform/drm/gpu/gbm_surfaceless.h"
+
+namespace ui {
+
+class DrmWindowProxy;
+class GbmSurfaceFactory;
+
+// A GLSurface for GBM Ozone platform provides surface-like semantics
+// implemented through surfaceless. A framebuffer is bound automatically.
+class GbmSurface : public GbmSurfaceless {
+ public:
+  GbmSurface(GbmSurfaceFactory* surface_factory,
+             std::unique_ptr<DrmWindowProxy> window,
+             gfx::AcceleratedWidget widget);
+
+  // gl::GLSurface:
+  unsigned int GetBackingFrameBufferObject() override;
+  bool OnMakeCurrent(gl::GLContext* context) override;
+  bool Resize(const gfx::Size& size,
+              float scale_factor,
+              bool has_alpha) override;
+  bool SupportsPostSubBuffer() override;
+  void SwapBuffersAsync(const SwapCompletionCallback& callback) override;
+  void Destroy() override;
+  bool IsSurfaceless() const override;
+
+ private:
+  ~GbmSurface() override;
+
+  void BindFramebuffer();
+  bool CreatePixmaps();
+
+  scoped_refptr<gl::GLContext> context_;
+  GLuint fbo_ = 0;
+  GLuint textures_[2];
+  scoped_refptr<gl::GLImage> images_[2];
+  int current_surface_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(GbmSurface);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_GBM_SURFACE_H_