Change RenderObject::style(bool) to accept an enum instead

Source/core/rendering/line/BreakingContextInlineHeaders.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 148 matching lines @@
     // If a space (U+0020) at the end of a line has 'white-space' set to 'normal', 'nowrap', or 'pre-line', it is also removed.
     // If spaces (U+0020) or tabs (U+0009) at the end of a line have 'white-space' set to 'pre-wrap', UAs may visually collapse them.
     return style->collapseWhiteSpace()
         || (whitespacePosition == TrailingWhitespace && style->whiteSpace() == PRE_WRAP && (!lineInfo.isEmpty() || !lineInfo.previousLineBrokeCleanly()));
 }
 
 inline bool requiresLineBoxForContent(RenderInline* flow, const LineInfo& lineInfo)
 {
     RenderObject* parent = flow->parent();
     if (flow->document().inNoQuirksMode()
-        && (flow->style(lineInfo.isFirstLine())->lineHeight() != parent->style(lineInfo.isFirstLine())->lineHeight()
+        && (flow->style(lineInfo.isFirstLine() ? FirstLineStyle : OwnStyle)->lineHeight() != parent->style(lineInfo.isFirstLine() ? FirstLineStyle : OwnStyle)->lineHeight()
         || flow->style()->verticalAlign() != parent->style()->verticalAlign()
         || !parent->style()->font().fontMetrics().hasIdenticalAscentDescentAndLineGap(flow->style()->font().fontMetrics())))
         return true;
     return false;
 }
 
 inline bool alwaysRequiresLineBox(RenderObject* flow)
 {
     // FIXME: Right now, we only allow line boxes for inlines that are truly empty.
     // We need to fix this, though, because at the very least, inlines containing only
@@ skipping 358 matching lines @@
         RenderCombineText* combineRenderer = toRenderCombineText(m_current.object());
         combineRenderer->combineText();
         // The length of the renderer's text may have changed. Increment stale iterator positions
         if (iteratorIsBeyondEndOfRenderCombineText(m_lineBreak, combineRenderer)) {
             ASSERT(iteratorIsBeyondEndOfRenderCombineText(m_resolver.position(), combineRenderer));
             m_lineBreak.increment();
             m_resolver.position().increment(&m_resolver);
         }
     }
 
-    RenderStyle* style = renderText->style(m_lineInfo.isFirstLine());
+    RenderStyle* style = renderText->style(m_lineInfo.isFirstLine() ? FirstLineStyle : OwnStyle);
     const Font& font = style->font();
     bool isFixedPitch = font.isFixedPitch();
 
     unsigned lastSpace = m_current.offset();
     float wordSpacing = m_currentStyle->wordSpacing();
     float lastSpaceWordSpacing = 0;
     float wordSpacingForWordMeasurement = 0;
 
     float wrapW = m_width.uncommittedWidth() + inlineLogicalWidth(m_current.object(), !m_appliedStartWidth, true);
     float charWidth = 0;
@@ skipping 342 matching lines @@
 
     if (style->textIndentType() == TextIndentHanging)
         shouldIndentText = shouldIndentText == IndentText ? DoNotIndentText : IndentText;
 
     return shouldIndentText;
 }
 
 }
 
 #endif // BreakingContextInlineHeaders_h