stop using bitmap-filter flags outside of paint itself, as a step towards really changing them into…

gm/downsamplebitmap.cpp

Index: gm/downsamplebitmap.cpp
diff --git a/gm/downsamplebitmap.cpp b/gm/downsamplebitmap.cpp
index e34effa07fb3d16cd1cef9b0006ab400cf0ec302..5cb971d77a3da37ab7370a3949e8d79d82797d94 100644
--- a/gm/downsamplebitmap.cpp
+++ b/gm/downsamplebitmap.cpp
@@ -64,8 +64,7 @@ protected:
             matrix.setScale( curScale, curScale );
 
             SkPaint paint;
-            paint.setFilterBitmap(true);
-            paint.setFlags( paint.getFlags() | SkPaint::kHighQualityFilterBitmap_Flag );
+            paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
 
             canvas->save();
             canvas->translate( (SkScalar) curX, 0.f );