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

src/core/SkBitmapProcState.h

Index: src/core/SkBitmapProcState.h
diff --git a/src/core/SkBitmapProcState.h b/src/core/SkBitmapProcState.h
index b4fae045f8b606687bc35c87f9a3e2403bbddb07..349194f3b455c64c6f58a8285efbec8f709856b1 100644
--- a/src/core/SkBitmapProcState.h
+++ b/src/core/SkBitmapProcState.h
@@ -89,12 +89,7 @@ struct SkBitmapProcState {
     uint8_t             fInvType;           // chooseProcs
     uint8_t             fTileModeX;         // CONSTRUCTOR
     uint8_t             fTileModeY;         // CONSTRUCTOR
-
-    enum {
-        kNone_BitmapFilter,
-        kBilerp_BitmapFilter,
-        kHQ_BitmapFilter
-    } fFilterQuality;          // chooseProcs
+    uint8_t             fFilterLevel;       // chooseProcs
 
     /** The shader will let us know when we can release some of our resources
       * like scaled bitmaps.