Remove all uses of skia::RefPtr and stale includes

ui/ozone/platform/drm/gpu/drm_window_unittest.cc

 // 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.
 
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImageInfo.h"
+#include "third_party/skia/include/core/SkSurface.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_generator.h"
 #include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
 #include "ui/ozone/platform/drm/gpu/mock_drm_device.h"
 #include "ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.h"
 #include "ui/ozone/platform/drm/gpu/screen_manager.h"
 #include "ui/ozone/public/surface_ozone_canvas.h"
 
 namespace {
 
@@ skipping 150 matching lines @@
   EXPECT_EQ(1, on_swap_buffers_count_);
   EXPECT_EQ(gfx::SwapResult::SWAP_NAK_RECREATE_BUFFERS,
             last_swap_buffers_result_);
 
   window->SchedulePageFlip(
       std::vector<ui::OverlayPlane>(1, ui::OverlayPlane(plane)),
       base::Bind(&DrmWindowTest::OnSwapBuffers, base::Unretained(this)));
   EXPECT_EQ(2, on_swap_buffers_count_);
   EXPECT_EQ(gfx::SwapResult::SWAP_FAILED, last_swap_buffers_result_);
 }