Using Enum in place of bool for better code readability

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index 4b9d6dc1acb3badb4ffcb229decf3b38eebb2f1a..f7889ba8a231eb04bd9ed36137e7d9a74eb7cf39 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -1198,14 +1198,14 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSComputedStyleDeclaration::getFontSizeCSSValu
     return zoomAdjustedPixelValue(style->fontDescription().computedPixelSize(), *style);
 }
 
-bool CSSComputedStyleDeclaration::useFixedFontDefaultSize() const
+FixedPitchFontType CSSComputedStyleDeclaration::useFixedFontDefaultSize() const
 {
     if (!m_node)
-        return false;
+        return NonFixedPitchFont;
 
     RefPtr<RenderStyle> style = m_node->computedStyle(m_pseudoElementSpecifier);
     if (!style)
-        return false;
+        return NonFixedPitchFont;
 
     return style->fontDescription().useFixedDefaultSize();
 }