Remove a pointless use of SkWeakRefCnt.

src/ports/SkFontMgr_fontconfig.cpp

Index: src/ports/SkFontMgr_fontconfig.cpp
diff --git a/src/ports/SkFontMgr_fontconfig.cpp b/src/ports/SkFontMgr_fontconfig.cpp
index 6ec5604af4fbae11b4626d172499cab30b08a890..d7570d9354bc9a8ea9284241f1b3e305ae6b6c93 100644
--- a/src/ports/SkFontMgr_fontconfig.cpp
+++ b/src/ports/SkFontMgr_fontconfig.cpp
@@ -583,7 +583,7 @@ class SkFontMgr_fontconfig : public SkFontMgr {
             FcPatternReference(pattern);
             face = SkTypeface_fontconfig::Create(pattern);
             if (face) {
-                fTFCache.add(face, SkFontStyle(), true);
+                fTFCache.add(face, SkFontStyle());
             }
         }
         return face;