Revert of It is dangerous to ignore SkRect::intersect's return value

src/utils/SkGatherPixelRefsAndRects.h

Index: src/utils/SkGatherPixelRefsAndRects.h
diff --git a/src/utils/SkGatherPixelRefsAndRects.h b/src/utils/SkGatherPixelRefsAndRects.h
index 9589c3ea3852ba8a5fb2ffeccc13d47823c9186b..6e11fbe6d58a350f1c8008187a4114f0d3e96d6e 100644
--- a/src/utils/SkGatherPixelRefsAndRects.h
+++ b/src/utils/SkGatherPixelRefsAndRects.h
@@ -79,9 +79,8 @@
             SkRect mappedRect;
             draw.fMatrix->mapRect(&mappedRect, rect);
             SkRect clipRect = SkRect::Make(draw.fRC->getBounds());
-            if (mappedRect.intersect(clipRect)) {
-                fPRCont->add(bm.pixelRef(), mappedRect);
-            }
+            mappedRect.intersect(clipRect);
+            fPRCont->add(bm.pixelRef(), mappedRect);
         }
     }
     virtual void drawOval(const SkDraw& draw, const SkRect& rect,