Remove all uses of skia::RefPtr and stale includes

ui/ozone/platform/drm/gpu/screen_manager.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/screen_manager.h"
 
 #include <xf86drmMode.h>
 
 #include <utility>
 
@@ skipping 42 matching lines @@
   }
 
   // Don't copy anything if the sizes mismatch. This can happen when the user
   // changes modes.
   if (saved_buffer.canvas()->getBaseLayerSize() !=
       modeset_buffer.canvas()->getBaseLayerSize()) {
     VLOG(2) << "Previous buffer has a different size than modeset buffer";
     return;
   }
 
-  skia::RefPtr<SkImage> image = saved_buffer.image();
   SkPaint paint;
   // Copy the source buffer. Do not perform any blending.
   paint.setXfermodeMode(SkXfermode::kSrc_Mode);
-  modeset_buffer.canvas()->drawImage(image.get(), 0, 0, &paint);
+  modeset_buffer.canvas()->drawImage(saved_buffer.image(), 0, 0, &paint);
 }
 
 CrtcController* GetCrtcController(HardwareDisplayController* controller,
                                   const scoped_refptr<DrmDevice>& drm,
                                   uint32_t crtc) {
   for (const auto& crtc_controller : controller->crtc_controllers()) {
     if (crtc_controller->crtc() == crtc)
       return crtc_controller.get();
   }
 
@@ skipping 306 matching lines @@
 DrmWindow* ScreenManager::FindWindowAt(const gfx::Rect& bounds) const {
   for (auto pair : window_map_) {
     if (pair.second->bounds() == bounds)
       return pair.second;
   }
 
   return nullptr;
 }
 
 }  // namespace ui