Minimal changes to not crash GPU with color fonts.

Review URL: https://codereview.chromium.org/88993003

git-svn-id: http://skia.googlecode.com/svn/trunk@12400 2bbb7eff-a529-9590-31e7-b0007b416f81

src/fonts/SkGScalerContext.cpp

@@ -176,6 +176,8 @@ SkScalerContext* SkGTypeface::onCreateScalerContext(
 
 void SkGTypeface::onFilterRec(SkScalerContextRec* rec) const {
     fProxy->filterRec(rec);
+    rec->setHinting(SkPaint::kNo_Hinting);
+    rec->fMaskFormat = SkMask::kARGB32_Format;
 }
 
 SkAdvancedTypefaceMetrics* SkGTypeface::onGetAdvancedTypefaceMetrics(

src/gpu/SkGrFontScaler.cpp

@@ -85,6 +85,8 @@ GrMaskFormat SkGrFontScaler::getMaskFormat() {
             return kA8_GrMaskFormat;
         case SkMask::kLCD16_Format:
             return kA565_GrMaskFormat;
+        // TODO: properly support kARGB32_Format.
+        case SkMask::kARGB32_Format:
         case SkMask::kLCD32_Format:
             return kA888_GrMaskFormat;
         default: