Make EImageRendering an enum class.

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * 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.
@@ skipping 516 matching lines @@
 }
 
 void HTMLCanvasElement::Paint(GraphicsContext& context, const LayoutRect& r) {
   // FIXME: crbug.com/438240; there is a bug with the new CSS blending and
   // compositing feature.
   if (!context_ && !PlaceholderFrame())
     return;
 
   const ComputedStyle* style = EnsureComputedStyle();
   SkFilterQuality filter_quality =
-      (style && style->ImageRendering() == kImageRenderingPixelated)
+      (style && style->ImageRendering() == EImageRendering::kPixelated)
           ? kNone_SkFilterQuality
           : kLow_SkFilterQuality;
 
   if (Is3d()) {
     context_->SetFilterQuality(filter_quality);
   } else if (GetImageBuffer()) {
     image_buffer_->SetFilterQuality(filter_quality);
   }
 
   if (GetImageBuffer() && !image_buffer_is_clear_)
@@ skipping 882 matching lines @@
     // Creates a placeholder layer first before Surface is created.
     surface_layer_bridge_->CreateSolidColorLayer();
   }
 }
 
 void HTMLCanvasElement::OnWebLayerReplaced() {
   SetNeedsCompositingUpdate();
 }
 
 }  // namespace blink