Mac: Fix fallback font selection for custom fonts

Source/platform/fonts/mac/FontCacheMac.mm

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 137 matching lines @@
         traits = fontDescription.style() ? NSFontItalicTrait : 0;
         weight = toAppKitFontWeight(fontDescription.weight());
         size = fontDescription.computedPixelSize();
     }
 
     NSFontTraitMask substituteFontTraits = [fontManager traitsOfFont:substituteFont];
     NSInteger substituteFontWeight = [fontManager weightOfFont:substituteFont];
 
     if (traits != substituteFontTraits || weight != substituteFontWeight || !nsFont) {
         if (NSFont *bestVariation = [fontManager fontWithFamily:[substituteFont familyName] traits:traits weight:weight size:size]) {
-            if (!nsFont || (([fontManager traitsOfFont:bestVariation] != substituteFontTraits || [fontManager weightOfFont:bestVariation] != substituteFontWeight)
-                && [[bestVariation coveredCharacterSet] longCharacterIsMember:character]))
+            if ((!nsFont || [fontManager traitsOfFont:bestVariation] != substituteFontTraits || [fontManager weightOfFont:bestVariation] != substituteFontWeight)
+                && [[bestVariation coveredCharacterSet] longCharacterIsMember:character])
                 substituteFont = bestVariation;
         }
     }
 
     // Enable hinting, which is equivalent to using the screen font,
     // only when running the set of standard non-subpixel layout tests,
     // otherwise use subpixel glyph positioning.
     substituteFont = !isRunningLayoutTest() || isFontAntialiasingEnabledForTest() ? [substituteFont printerFont] : [substituteFont screenFont];
 
     substituteFontTraits = [fontManager traitsOfFont:substituteFont];
@@ skipping 50 matching lines @@
 
     // FontPlatformData::font() can be null for the case of Chromium out-of-process font loading.
     // In that case, we don't want to use the platformData.
     OwnPtr<FontPlatformData> platformData = adoptPtr(new FontPlatformData(platformFont, size, syntheticBold, syntheticOblique, fontDescription.orientation(), fontDescription.widthVariant()));
     if (!platformData->font())
         return 0;
     return platformData.leakPtr();
 }
 
 } // namespace WebCore