Revert "speed up A8 by creating a new entry-point in SkDraw that blits the path's coverage directly…

src/gpu/GrSWMaskHelper.h

Index: src/gpu/GrSWMaskHelper.h
diff --git a/src/gpu/GrSWMaskHelper.h b/src/gpu/GrSWMaskHelper.h
index 097f62c048c367e17242810cf811aea345f27ac7..b274e84c66d7164f9ea8151910c56ad2638ea66d 100644
--- a/src/gpu/GrSWMaskHelper.h
+++ b/src/gpu/GrSWMaskHelper.h
@@ -48,8 +48,7 @@ public:
     // may be accumulated in the helper during creation, "resultBounds"
     // allows the caller to specify the region of interest - to limit the
     // amount of work.
-    bool init(const SkIRect& resultBounds, const SkMatrix* matrix,
-              bool zeroPixels = true);
+    bool init(const SkIRect& resultBounds, const SkMatrix* matrix);
 
     // Draw a single rect into the accumulation bitmap using the specified op
     void draw(const SkRect& rect, SkRegion::Op op,