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

Source/core/rendering/RenderInline.cpp

Index: Source/core/rendering/RenderInline.cpp
diff --git a/Source/core/rendering/RenderInline.cpp b/Source/core/rendering/RenderInline.cpp
index 80041d5a9347a75ed72c0db09d8dfafa1641db3b..1f31e0fd90643ea95cdf8e4dac0599d4e6cec00e 100644
--- a/Source/core/rendering/RenderInline.cpp
+++ b/Source/core/rendering/RenderInline.cpp
@@ -217,8 +217,8 @@ void RenderInline::updateAlwaysCreateLineBoxes(bool fullLayout)
 
     if (!alwaysCreateLineBoxes && checkFonts && document().styleEngine()->usesFirstLineRules()) {
         // Have to check the first line style as well.
-        parentStyle = parent()->style(true);
-        RenderStyle* childStyle = style(true);
+        parentStyle = parent()->style(FirstLineStyle);
+        RenderStyle* childStyle = style(FirstLineStyle);
         alwaysCreateLineBoxes = !parentStyle->font().fontMetrics().hasIdenticalAscentDescentAndLineGap(childStyle->font().fontMetrics())
         || childStyle->verticalAlign() != BASELINE
         || parentStyle->lineHeight() != childStyle->lineHeight();
@@ -1277,9 +1277,9 @@ InlineFlowBox* RenderInline::createAndAppendInlineFlowBox()
     return flowBox;
 }
 
-LayoutUnit RenderInline::lineHeight(bool firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
+LayoutUnit RenderInline::lineHeight(OwnOrFirstLineStyle firstLine, LineDirectionMode /*direction*/, LinePositionMode /*linePositionMode*/) const
 {
-    if (firstLine && document().styleEngine()->usesFirstLineRules()) {
+    if (firstLine == FirstLineStyle && document().styleEngine()->usesFirstLineRules()) {
         RenderStyle* s = style(firstLine);
         if (s != style())
             return s->computedLineHeight();
@@ -1288,7 +1288,7 @@ LayoutUnit RenderInline::lineHeight(bool firstLine, LineDirectionMode /*directio
     return style()->computedLineHeight();
 }
 
-int RenderInline::baselinePosition(FontBaseline baselineType, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
+int RenderInline::baselinePosition(FontBaseline baselineType, OwnOrFirstLineStyle firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
 {
     ASSERT(linePositionMode == PositionOnContainingLine);
     const FontMetrics& fontMetrics = style(firstLine)->fontMetrics();