Rename RenderStyle::diff and RenderStyle::compare to better names

Source/core/rendering/style/RenderStyle.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
  * License as published by the Free Software Foundation; either
@@ skipping 338 matching lines @@
     };
     ALWAYS_INLINE explicit RenderStyle(DefaultStyleTag);
     ALWAYS_INLINE RenderStyle(const RenderStyle&);
 
 public:
     static PassRefPtr<RenderStyle> create();
     static PassRefPtr<RenderStyle> createDefaultStyle();
     static PassRefPtr<RenderStyle> createAnonymousStyleWithDisplay(const RenderStyle* parentStyle, EDisplay);
     static PassRefPtr<RenderStyle> clone(const RenderStyle*);
 
-    static StyleRecalcChange compare(const RenderStyle* oldStyle, const RenderStyle* newStyle);
+    // Computes how the style change should be propogated through the tree.

[rune, 2014/03/27 11:50:51]

Minor nit: I think I would have said "down the tree" instead of "through the
tree", but you're the native speaker here.

+    static StyleRecalcChange stylePropogationDiff(const RenderStyle* oldStyle, const RenderStyle* newStyle);

[rune, 2014/03/27 11:50:51]

Propogation -> Propagation

Same misspelling in the CL description.

+
+    // Computes how much visual invalidation the style change causes: layout, repaint or recomposite.
+    StyleDifference visualInvalidationDiff(const RenderStyle*, unsigned& changedContextSensitiveProperties) const;
 
     enum IsAtShadowBoundary {
         AtShadowBoundary,
         NotAtShadowBoundary,
     };
 
     void inheritFrom(const RenderStyle* inheritParent, IsAtShadowBoundary = NotAtShadowBoundary);
     void copyNonInheritedFrom(const RenderStyle*);
 
     PseudoId styleType() const { return static_cast<PseudoId>(noninherited_flags._styleType); }
@@ skipping 1117 matching lines @@
     const CounterDirectives getCounterDirectives(const AtomicString& identifier) const;
 
     QuotesData* quotes() const { return rareInheritedData->quotes.get(); }
     void setQuotes(PassRefPtr<QuotesData>);
 
     const AtomicString& hyphenString() const;
 
     bool inheritedNotEqual(const RenderStyle*) const;
     bool inheritedDataShared(const RenderStyle*) const;
 
-    StyleDifference diff(const RenderStyle*, unsigned& changedContextSensitiveProperties) const;
-
     bool isDisplayReplacedType() const { return isDisplayReplacedType(display()); }
     bool isDisplayInlineType() const { return isDisplayInlineType(display()); }
     bool isOriginalDisplayInlineType() const { return isDisplayInlineType(originalDisplay()); }
 
     bool setWritingMode(WritingMode v)
     {
         if (v == writingMode())
             return false;
 
         inherited_flags.m_writingMode = v;
@@ skipping 367 matching lines @@
 inline bool RenderStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags._pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 float calcBorderRadiiConstraintScaleFor(const FloatRect&, const FloatRoundedRect::Radii&);
 
 } // namespace WebCore
 
 #endif // RenderStyle_h