Separate repaint and layout requirements of StyleDifference (Step 1)

Source/core/rendering/style/RenderStyleConstants.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/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
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     Reattach,
     ReattachNoRenderer
 };
 
 static const size_t PrintColorAdjustBits = 1;
 enum PrintColorAdjust {
     PrintColorAdjustEconomy,
     PrintColorAdjustExact
 };
 
-// The difference between two styles.  The following values are used:
-// - StyleDifferenceEqual - The two styles are identical.
-//   FIXME: When style difference is context sensitive, RenderStyle::visualInvalidationDiff() may return
-//   StyleDifferenceEqual even there is difference. Will resolve the issue when fixing crbug.com/358460.
-// - StyleDifferenceRecompositeLayer - The layer needs its position and transform updated, but no repaint.
-// - StyleDifferenceRepaint - The object just needs to be repainted.
-// - StyleDifferenceRepaintLayer - The layer and its descendant layers need to be repainted.
-// - StyleDifferenceLayoutPositionedMovementOnly - Only the position of this positioned object has been updated.
-// - StyleDifferenceSimplifiedLayout - Only overflow needs to be recomputed.
-// - StyleDifferenceSimplifiedLayoutAndPositionedMovement - Both positioned movement and simplified layout updates are required.
-// - StyleDifferenceLayout - A full layout is required.
-enum StyleDifference {
-    StyleDifferenceEqual,
-    StyleDifferenceRecompositeLayer,
-    StyleDifferenceRepaint,
-    StyleDifferenceRepaintLayer,
-    StyleDifferenceLayoutPositionedMovementOnly,
-    StyleDifferenceSimplifiedLayout,
-    StyleDifferenceSimplifiedLayoutAndPositionedMovement,
-    StyleDifferenceLayout
-};
-
-// When some style properties change, different amounts of work have to be done depending on
-// context (e.g. whether the property is changing on an element which has a compositing layer).
-// A simple StyleDifference does not provide enough information so we return a bit mask of
-// StyleDifferenceContextSensitiveProperties from RenderStyle::visualInvalidationDiff() too.
-enum StyleDifferenceContextSensitiveProperty {
-    ContextSensitivePropertyNone = 0,
-    ContextSensitivePropertyTransform = (1 << 0),
-    ContextSensitivePropertyOpacity = (1 << 1),
-    ContextSensitivePropertyFilter = (1 << 2),
-    // The object needs to be repainted if it contains text or properties dependent on color (e.g., border or outline).
-    ContextSensitivePropertyTextOrColor = (1 << 3)
-};
-
 // Static pseudo styles. Dynamic ones are produced on the fly.
 enum PseudoId {
     // The order must be NOP ID, public IDs, and then internal IDs.
     // If you add or remove a public ID, you must update _pseudoBits in RenderStyle.
     NOPSEUDO, FIRST_LINE, FIRST_LETTER, BEFORE, AFTER, BACKDROP, SELECTION, FIRST_LINE_INHERITED, SCROLLBAR,
     // Internal IDs follow:
     SCROLLBAR_THUMB, SCROLLBAR_BUTTON, SCROLLBAR_TRACK, SCROLLBAR_TRACK_PIECE, SCROLLBAR_CORNER, RESIZER, INPUT_LIST_BUTTON,
     // Special values follow:
     AFTER_LAST_INTERNAL_PSEUDOID,
     FIRST_PUBLIC_PSEUDOID = FIRST_LINE,
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 // Reasonable maximum to prevent insane font sizes from causing crashes on some platforms (such as Windows).
 static const float maximumAllowedFontSize = 1000000.0f;
 
 enum TextIndentLine { TextIndentFirstLine, TextIndentEachLine };
 
 enum CSSBoxType { BoxMissing = 0, MarginBox, BorderBox, PaddingBox, ContentBox };
 
 } // namespace WebCore
 
 #endif // RenderStyleConstants_h