Make EImageRendering an enum class.

third_party/WebKit/Source/core/layout/ImageQualityController.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 55 matching lines @@
   return g_image_quality_controller &&
          g_image_quality_controller->object_layer_size_map_.Contains(
              &layout_object);
 }
 
 InterpolationQuality ImageQualityController::ChooseInterpolationQuality(
     const LayoutObject& object,
     Image* image,
     const void* layer,
     const LayoutSize& layout_size) {
-  if (object.Style()->ImageRendering() == kImageRenderingPixelated)
+  if (object.Style()->ImageRendering() == EImageRendering::kPixelated)
     return kInterpolationNone;
 
   if (kInterpolationDefault == kInterpolationLow)
     return kInterpolationLow;
 
   if (ShouldPaintAtLowQuality(object, image, layer, layout_size,
                               object.GetFrameView()
                                   ->GetPage()
                                   ->GetChromeClient()
                                   .LastFrameTimeMonotonic()))
@@ skipping 85 matching lines @@
     const LayoutSize& layout_size,
     double last_frame_time_monotonic) {
   // If the image is not a bitmap image, then none of this is relevant and we
   // just paint at high quality.
   if (!image || !image->IsBitmapImage())
     return false;
 
   if (!layer)
     return false;
 
-  if (object.Style()->ImageRendering() == kImageRenderingOptimizeContrast)
+  if (object.Style()->ImageRendering() == EImageRendering::kOptimizeContrast)
     return true;
 
   if (LocalFrame* frame = object.GetFrame()) {
     if (frame->GetSettings() &&
         frame->GetSettings()->GetUseDefaultImageInterpolationQuality())
       return false;
   }
 
   // Look ourselves up in the hashtables.
   ObjectLayerSizeMap::iterator i = object_layer_size_map_.find(&object);
@@ skipping 45 matching lines @@
   }
   // This object has been resized to two different sizes while the timer
   // is active, so draw at low quality, set the flag for animated resizes and
   // the object to the list for high quality redraw.
   Set(object, inner_map, layer, layout_size, true);
   RestartTimer(last_frame_time_monotonic);
   return true;
 }
 
 }  // namespace blink