SkPaint::FilterLevel -> SkFilterQuality

clone (+rebase) of https://codereview.chromium.org/1009183002/

BUG=skia:
TBR=scroggo@google.com

Review URL: https://codereview.chromium.org/1014533004
diff --git a/gm/tallstretchedbitmaps.cpp b/gm/tallstretchedbitmaps.cpp
index 06b2335..e62c5d7 100644
--- a/gm/tallstretchedbitmaps.cpp
+++ b/gm/tallstretchedbitmaps.cpp
@@ -87,7 +87,7 @@
                                                bmp.width(), bmp.height());
             SkRect dstRect = SkRect::MakeWH(SkIntToScalar(bmp.width()), 10.f * itemHeight);
             SkPaint paint;
-            paint.setFilterLevel(SkPaint::kLow_FilterLevel);
+            paint.setFilterQuality(kLow_SkFilterQuality);
             canvas->drawBitmapRect(bmp, &subRect, dstRect, &paint);
             canvas->translate(SkIntToScalar(bmp.width() + 10), 0);
         }