ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/platform/drm/gbm_surface_factory.h

 // Copyright 2014 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_GBM_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_DRM_GBM_SURFACE_FACTORY_H_
 
 #include "ui/ozone/platform/drm/drm_surface_factory.h"
 
 namespace ui {
@@ skipping 30 matching lines @@
       BufferUsage usage) override;
   OverlayCandidatesOzone* GetOverlayCandidates(
       gfx::AcceleratedWidget w) override;
   bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                             int plane_z_order,
                             gfx::OverlayTransform plane_transform,
                             scoped_refptr<NativePixmap> buffer,
                             const gfx::Rect& display_bounds,
                             const gfx::RectF& crop_rect) override;
   bool CanShowPrimaryPlaneAsOverlay() override;
-  bool CanCreateNativePixmap(BufferUsage usage) override;
 
  private:
   scoped_refptr<GbmDevice> GetGbmDevice(gfx::AcceleratedWidget widget);
 
   bool allow_surfaceless_;
 
   DrmDeviceManager* drm_device_manager_;  // Not owned.
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GBM_SURFACE_FACTORY_H_