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 7f087fe05d18d07ef43b7e7979019bb895e1a1cc..e258142055270a09cff290578d04a93272052e5a 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();
 
     Key key(scaler);
@@ -65,6 +65,7 @@ GrTextStrike* GrFontCache::getStrike(GrFontScaler* scaler) {
         strike->fPrev = NULL;
         fHead = strike;
     }
+    strike->fUseDistanceField = useDistanceField;
 
     this->validate();
     return strike;