Explicitly compare FontVariant to enumerators.

Source/platform/fonts/mac/ComplexTextController.cpp

Index: Source/platform/fonts/mac/ComplexTextController.cpp
diff --git a/Source/platform/fonts/mac/ComplexTextController.cpp b/Source/platform/fonts/mac/ComplexTextController.cpp
index 75353ad5c12d70c4813b20105554011afe3e2c74..e325daebffd8559ea5653682f54aa138d3e9a9f8 100644
--- a/Source/platform/fonts/mac/ComplexTextController.cpp
+++ b/Source/platform/fonts/mac/ComplexTextController.cpp
@@ -244,7 +244,7 @@ void ComplexTextController::collectComplexTextRuns()
     } else
         cp = m_run.characters16();
 
-    if (m_font.fontDescription().variant())
+    if (m_font.fontDescription().variant() == FontVariantSmallCaps)
         m_smallCapsBuffer.resize(m_end);
 
     unsigned indexOfFontTransition = 0;
@@ -265,7 +265,7 @@ void ComplexTextController::collectComplexTextRuns()
     UChar uppercaseCharacter = 0;
 
     bool isSmallCaps;
-    bool nextIsSmallCaps = m_font.fontDescription().variant() && !(U_GET_GC_MASK(baseCharacter) & U_GC_M_MASK) && (uppercaseCharacter = u_toupper(baseCharacter)) != baseCharacter;
+    bool nextIsSmallCaps = m_font.fontDescription().variant() == FontVariantSmallCaps && !(U_GET_GC_MASK(baseCharacter) & U_GC_M_MASK) && (uppercaseCharacter = u_toupper(baseCharacter)) != baseCharacter;
 
     if (nextIsSmallCaps) {
         m_smallCapsBuffer[sequenceStart - cp] = uppercaseCharacter;