Use #if instead of #ifdef with SK_HAS_DWRITE_X.

src/ports/SkFontMgr_win_dw.cpp

Index: src/ports/SkFontMgr_win_dw.cpp
diff --git a/src/ports/SkFontMgr_win_dw.cpp b/src/ports/SkFontMgr_win_dw.cpp
index 669a95b2d594b30d5e4e2c887cec32acd0d5f3e6..bff8593688e0ae03e351f4be4c7103886d1a4e61 100644
--- a/src/ports/SkFontMgr_win_dw.cpp
+++ b/src/ports/SkFontMgr_win_dw.cpp
@@ -266,7 +266,7 @@ public:
         , fFontCollection(SkRefComPtr(fontCollection))
         , fLocaleName(localeNameLength)
     {
-#ifdef SK_HAS_DWRITE_2_H
+#if SK_HAS_DWRITE_2_H
         if (!SUCCEEDED(fFactory->QueryInterface(&fFactory2))) {
             // IUnknown::QueryInterface states that if it fails, punk will be set to NULL.
             // http://blogs.msdn.com/b/oldnewthing/archive/2004/03/26/96777.aspx
@@ -304,7 +304,7 @@ private:
                                              IDWriteFontFamily* fontFamily) const;
 
     SkTScopedComPtr<IDWriteFactory> fFactory;
-#ifdef SK_HAS_DWRITE_2_H
+#if SK_HAS_DWRITE_2_H
     SkTScopedComPtr<IDWriteFactory2> fFactory2;
 #endif
     SkTScopedComPtr<IDWriteFontCollection> fFontCollection;