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

Source/core/rendering/line/BreakingContextInlineHeaders.h

Index: Source/core/rendering/line/BreakingContextInlineHeaders.h
diff --git a/Source/core/rendering/line/BreakingContextInlineHeaders.h b/Source/core/rendering/line/BreakingContextInlineHeaders.h
index 7e9184dc1ddd955f6b1ce72564f78bc0e7deb327..c2689386908db1a3ef46197a4b72bd2e1767a814 100644
--- a/Source/core/rendering/line/BreakingContextInlineHeaders.h
+++ b/Source/core/rendering/line/BreakingContextInlineHeaders.h
@@ -166,7 +166,7 @@ inline bool requiresLineBoxForContent(RenderInline* flow, const LineInfo& lineIn
 {
     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;
@@ -545,7 +545,7 @@ inline bool BreakingContext::handleText(WordMeasurements& wordMeasurements, bool
         }
     }
 
-    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();