Changing imageFilter GM tests to use drawBitmap instead of drawSprite

The motivation is be able to test the filters with scaled SkPicture playback in isolation from the issues that surround usage of drawSprite
Review URL: https://codereview.appspot.com/7060071

git-svn-id: http://skia.googlecode.com/svn/trunk@7152 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gm.h b/gm/gm.h
index 9460ec0..0af9285 100644
--- a/gm/gm.h
+++ b/gm/gm.h
@@ -34,11 +34,12 @@
         virtual ~GM();
 
         enum Flags {
-            kSkipPDF_Flag       = 1 << 0,
-            kSkipPicture_Flag   = 1 << 1,
-            kSkipPipe_Flag      = 1 << 2,
-            kSkipTiled_Flag     = 1 << 3,
-            kSkip565_Flag       = 1 << 4,
+            kSkipPDF_Flag           = 1 << 0,
+            kSkipPicture_Flag       = 1 << 1,
+            kSkipPipe_Flag          = 1 << 2,
+            kSkipTiled_Flag         = 1 << 3,
+            kSkip565_Flag           = 1 << 4,
+            kSkipScaledReplay_Flag  = 1 << 5,
         };
 
         void draw(SkCanvas*);