ozone: Remove the "drm" software composited platform

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

Index: ui/ozone/platform/drm/gpu/drm_surface_factory.h
diff --git a/ui/ozone/platform/drm/gpu/drm_surface_factory.h b/ui/ozone/platform/drm/gpu/drm_surface_factory.h
deleted file mode 100644
index 223a7b9dc28cf5f99bc9a73b3198d75b8407ed87..0000000000000000000000000000000000000000
--- a/ui/ozone/platform/drm/gpu/drm_surface_factory.h
+++ /dev/null
@@ -1,41 +0,0 @@
-// 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_GPU_DRM_SURFACE_FACTORY_H_
-#define UI_OZONE_PLATFORM_DRM_GPU_DRM_SURFACE_FACTORY_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "ui/ozone/public/surface_factory_ozone.h"
-
-namespace ui {
-
-class ScreenManager;
-class SurfaceOzoneCanvas;
-
-// SurfaceFactoryOzone implementation on top of DRM/KMS using dumb buffers.
-// This implementation is used in conjunction with the software rendering
-// path.
-class DrmSurfaceFactory : public SurfaceFactoryOzone {
- public:
-  DrmSurfaceFactory(ScreenManager* screen_manager);
-  ~DrmSurfaceFactory() override;
-
-  // SurfaceFactoryOzone:
-  scoped_ptr<SurfaceOzoneCanvas> CreateCanvasForWidget(
-      gfx::AcceleratedWidget widget) override;
-  bool LoadEGLGLES2Bindings(
-      AddGLLibraryCallback add_gl_library,
-      SetGLGetProcAddressProcCallback set_gl_get_proc_address) override;
-
- protected:
-  ScreenManager* screen_manager_;  // Not owned.
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(DrmSurfaceFactory);
-};
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_SURFACE_FACTORY_H_