Hook in rough distance field support for fonts

src/gpu/GrTextStrike_impl.h

Index: src/gpu/GrTextStrike_impl.h
diff --git a/src/gpu/GrTextStrike_impl.h b/src/gpu/GrTextStrike_impl.h
index 130509c5d8bc5c3d3f3456a3972f3cb88b409f6b..ad74ff5206467041a7108f0d519beca074199285 100644
--- a/src/gpu/GrTextStrike_impl.h
+++ b/src/gpu/GrTextStrike_impl.h
@@ -48,7 +48,7 @@ void GrFontCache::detachStrikeFromList(GrTextStrike* strike) {
     }
 }
 
-GrTextStrike* GrFontCache::getStrike(GrFontScaler* scaler) {
+GrTextStrike* GrFontCache::getStrike(GrFontScaler* scaler, bool useDistanceField) {
     this->validate();
 
     const Key key(scaler->getKey());
@@ -65,6 +65,7 @@ GrTextStrike* GrFontCache::getStrike(GrFontScaler* scaler) {
         strike->fPrev = NULL;
         fHead = strike;
     }
+    strike->fUseDistanceField = useDistanceField;
 
     this->validate();
     return strike;