Make EImageRendering an enum class.

third_party/WebKit/Source/core/style/ComputedStyleConstants.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 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 299 matching lines @@
 };
 
 enum TextOrientation {
   kTextOrientationMixed,
   kTextOrientationUpright,
   kTextOrientationSideways
 };
 
 enum TextOverflow { kTextOverflowClip = 0, kTextOverflowEllipsis };
 
-enum EImageRendering {
-  kImageRenderingAuto,
-  kImageRenderingOptimizeSpeed,
-  kImageRenderingOptimizeQuality,
-  kImageRenderingOptimizeContrast,
-  kImageRenderingPixelated
+enum class EImageRendering {
+  kAuto,
+  kOptimizeSpeed,
+  kOptimizeQuality,
+  kOptimizeContrast,
+  kPixelated
 };
 
 enum RubyPosition { kRubyPositionBefore, kRubyPositionAfter };
 
 static const size_t kGridAutoFlowBits = 4;
 enum InternalGridAutoFlowAlgorithm {
   kInternalAutoFlowAlgorithmSparse = 0x1,
   kInternalAutoFlowAlgorithmDense = 0x2
 };
 
@@ skipping 115 matching lines @@
 // fraction, which leaves 20 bits for the integer part, making 1048575
 // the largest number.
 
 static const int kBorderWidthFractionalBits = 6;
 static const int kBorderWidthDenominator = 1 << kBorderWidthFractionalBits;
 static const int kMaxForBorderWidth = ((1 << 26) - 1) / kBorderWidthDenominator;
 
 }  // namespace blink
 
 #endif  // ComputedStyleConstants_h