Shut up the CoreText performance note.

src/ports/SkFontHost_mac.cpp

Index: src/ports/SkFontHost_mac.cpp
diff --git a/src/ports/SkFontHost_mac.cpp b/src/ports/SkFontHost_mac.cpp
index 3c1a274887728feebe9570ce5f4c0ce56eae247f..fe3fd069817be56a3406d2b03c57ca7882812e91 100755
--- a/src/ports/SkFontHost_mac.cpp
+++ b/src/ports/SkFontHost_mac.cpp
@@ -2107,7 +2107,13 @@ static SkTypeface* createFromDesc(CFStringRef cfFamilyName,
         return face;
     }
 
-    AutoCFRelease<CTFontRef> ctNamed(CTFontCreateWithName(cfFamilyName, 1, NULL));
+    AutoCFRelease<CFDictionaryRef> fontFamilyNameDictionary(
+        CFDictionaryCreate(kCFAllocatorDefault,
+                           (const void**)&kCTFontFamilyNameAttribute, (const void**)&cfFamilyName,
+                           1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));
+    AutoCFRelease<CTFontDescriptorRef> fontDescriptor(
+        CTFontDescriptorCreateWithAttributes(fontFamilyNameDictionary));
+    AutoCFRelease<CTFontRef> ctNamed(CTFontCreateWithFontDescriptor(fontDescriptor, 0, NULL));
     CTFontRef ctFont = CTFontCreateCopyWithAttributes(ctNamed, 1, NULL, desc);
     if (NULL == ctFont) {
         return NULL;