Make EImageRendering an enum class.

third_party/WebKit/Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1000 matching lines @@
   RefPtr<SVGImageForContainer> svg_image;
   if (image->IsSVGImage()) {
     KURL url = element->GetDocument().CompleteURL(element->ImageSourceURL());
     svg_image = SVGImageForContainer::Create(
         ToSVGImage(image), image_element_size_in_pixels, 1, url);
     image = svg_image.Get();
   }
 
   InterpolationQuality interpolation_quality =
       element->EnsureComputedStyle()->ImageRendering() ==
-              kImageRenderingPixelated
+              EImageRendering::kPixelated
           ? kInterpolationNone
           : kInterpolationHigh;
   RespectImageOrientationEnum should_respect_image_orientation =
       LayoutObject::ShouldRespectImageOrientation(element->GetLayoutObject());
   ImageOrientation orientation;
 
   if (should_respect_image_orientation == kRespectImageOrientation &&
       image->IsBitmapImage())
     orientation = ToBitmapImage(image)->CurrentFrameOrientation();
 
@@ skipping 237 matching lines @@
 
 DEFINE_TRACE(DragController) {
   visitor->Trace(page_);
   visitor->Trace(document_under_mouse_);
   visitor->Trace(drag_initiator_);
   visitor->Trace(drag_state_);
   visitor->Trace(file_input_element_under_mouse_);
 }
 
 }  // namespace blink