Make EImageRendering an enum class.

third_party/WebKit/Source/core/style/ComputedStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 943 matching lines @@
   }
   RespectImageOrientationEnum RespectImageOrientation() const {
     return static_cast<RespectImageOrientationEnum>(
         rare_inherited_data_->respect_image_orientation_);
   }
   void SetRespectImageOrientation(RespectImageOrientationEnum v) {
     SET_VAR(rare_inherited_data_, respect_image_orientation_, v);
   }
 
   // image-rendering
-  static EImageRendering InitialImageRendering() { return kImageRenderingAuto; }
+  static EImageRendering InitialImageRendering() {
+    return EImageRendering::kAuto;
+  }
   EImageRendering ImageRendering() const {
     return static_cast<EImageRendering>(rare_inherited_data_->image_rendering_);
   }
   void SetImageRendering(EImageRendering v) {
-    SET_VAR(rare_inherited_data_, image_rendering_, v);
+    SET_VAR(rare_inherited_data_, image_rendering_, static_cast<unsigned>(v));
   }
 
   // isolation
   static EIsolation InitialIsolation() { return kIsolationAuto; }
   EIsolation Isolation() const {
     return static_cast<EIsolation>(rare_non_inherited_data_->isolation_);
   }
   void SetIsolation(EIsolation v) {
     rare_non_inherited_data_.Access()->isolation_ = v;
   }
@@ skipping 2765 matching lines @@
       PseudoBitsInternal() | 1 << (pseudo - kFirstPublicPseudoId)));
 }
 
 inline bool ComputedStyle::HasPseudoElementStyle() const {
   return PseudoBitsInternal() & kElementPseudoIdMask;
 }
 
 }  // namespace blink
 
 #endif  // ComputedStyle_h