Make EImageRendering an enum class.

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 2424 matching lines @@
   }
 
   NOTREACHED();
   return AB_AUTO;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EImageRendering e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case kImageRenderingAuto:
+    case EImageRendering::kAuto:
       value_id_ = CSSValueAuto;
       break;
-    case kImageRenderingOptimizeSpeed:
+    case EImageRendering::kOptimizeSpeed:
       value_id_ = CSSValueOptimizeSpeed;
       break;
-    case kImageRenderingOptimizeQuality:
+    case EImageRendering::kOptimizeQuality:
       value_id_ = CSSValueOptimizeQuality;
       break;
-    case kImageRenderingPixelated:
+    case EImageRendering::kPixelated:
       value_id_ = CSSValuePixelated;
       break;
-    case kImageRenderingOptimizeContrast:
+    case EImageRendering::kOptimizeContrast:
       value_id_ = CSSValueWebkitOptimizeContrast;
       break;
   }
 }
 
 template <>
 inline EImageRendering CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueAuto:
-      return kImageRenderingAuto;
+      return EImageRendering::kAuto;
     case CSSValueOptimizeSpeed:
-      return kImageRenderingOptimizeSpeed;
+      return EImageRendering::kOptimizeSpeed;
     case CSSValueOptimizeQuality:
-      return kImageRenderingOptimizeQuality;
+      return EImageRendering::kOptimizeQuality;
     case CSSValuePixelated:
-      return kImageRenderingPixelated;
+      return EImageRendering::kPixelated;
     case CSSValueWebkitOptimizeContrast:
-      return kImageRenderingOptimizeContrast;
+      return EImageRendering::kOptimizeContrast;
     default:
       break;
   }
 
   NOTREACHED();
-  return kImageRenderingAuto;
+  return EImageRendering::kAuto;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(ETransformStyle3D e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
     case kTransformStyle3DFlat:
       value_id_ = CSSValueFlat;
       break;
     case kTransformStyle3DPreserve3D:
@@ skipping 800 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif