avoid AntiFrameRect when strokeSize is too small. Workaround for skbug/1368

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/17739003

git-svn-id: http://skia.googlecode.com/svn/trunk@9761 2bbb7eff-a529-9590-31e7-b0007b416f81

src/core/SkDraw.cpp

@@ -853,6 +853,11 @@ void SkDraw::drawRect(const SkRect& rect, const SkPaint& paint) const {
     SkPoint strokeSize;
     RectType rtype = ComputeRectType(paint, *fMatrix, &strokeSize);
 
+    // work-around bug in antiframerect when strokesize is < 1
+    if (strokeSize.fX < SK_Scalar1 || strokeSize.fY < SK_Scalar1) {
+        rtype = kPath_RectType;
+    }
+
     if (kPath_RectType == rtype) {
         SkPath  tmp;
         tmp.addRect(rect);