Fix unexpected blurry text caused by combination of skew and promotion

third_party/WebKit/Source/platform/transforms/TransformOperation.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 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
  * License as published by the Free Software Foundation; either
@@ skipping 81 matching lines @@
   virtual bool canBlendWith(const TransformOperation& other) const = 0;
 
   bool is3DOperation() const {
     OperationType opType = type();
     return opType == ScaleZ || opType == Scale3D || opType == TranslateZ ||
            opType == Translate3D || opType == RotateX || opType == RotateY ||
            opType == Rotate3D || opType == Matrix3D || opType == Perspective ||
            opType == Interpolated;
   }
 
+  bool isSkewOperation() const {
+    OperationType opType = type();
+    return opType == Skew || opType == SkewX || opType == SkewY;
+  }
+
   virtual bool dependsOnBoxSize() const { return false; }
 };
 
 #define DEFINE_TRANSFORM_TYPE_CASTS(thisType)                             \
   DEFINE_TYPE_CASTS(thisType, TransformOperation, transform,              \
                     thisType::isMatchingOperationType(transform->type()), \
                     thisType::isMatchingOperationType(transform.type()))
 
 }  // namespace blink
 
 #endif  // TransformOperation_h