Stop ping ponging AA in SkGpuDevice

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 7052d2531cff56b9212f964efb6b82df33900301..083bbe3348545af11b3d5b0bfae7c4e7f2528949 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -1037,28 +1037,6 @@ void SkGpuDevice::drawBitmapCommon(const SkDraw& draw,
                       bitmap.width() > maxTextureSize ||
                       bitmap.height() > maxTextureSize;
 
-    // we check whether dst rect are pixel aligned
-    if (!directDraw) {
-        bool staysRect = draw.fMatrix->rectStaysRect();
-
-        if (staysRect) {
-            SkRect rect;
-            SkRect dstRect = SkRect::MakeXYWH(0, 0, dstSize.fWidth, dstSize.fHeight);
-            draw.fMatrix->mapRect(&rect, dstRect);
-            const SkScalar *scalars = rect.asScalars();
-            bool isDstPixelAligned = true;
-            for (int i = 0; i < 4; i++) {
-                if (!SkScalarIsInt(scalars[i])) {
-                    isDstPixelAligned = false;
-                    break;
-                }
-            }
-
-            if (isDstPixelAligned)
-                directDraw = true;
-        }
-    }
-
     if (paint.getMaskFilter() || !directDraw) {
         // Convert the bitmap to a shader so that the rect can be drawn
         // through drawRect, which supports mask filters.