remove kRW_LegacyBitmapMode

experiment to see if there are any unknown dependencies
on kRW_LegacyBitmapMode

R=reed@google.com,fmalita@chromium.org,bungeman@google.com
Bug: skia:5615
Change-Id: I2cc578570ac18cd31c3520e1bd801f4a7a669347
Reviewed-on: https://skia-review.googlesource.com/105283
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
diff --git a/gm/drawbitmaprect.cpp b/gm/drawbitmaprect.cpp
index 200a397..6b5f6d9 100644
--- a/gm/drawbitmaprect.cpp
+++ b/gm/drawbitmaprect.cpp
@@ -79,7 +79,7 @@
 
     SkBitmap tempBM;
 
-    image->asLegacyBitmap(&tempBM, SkImage::kRO_LegacyBitmapMode);
+    image->asLegacyBitmap(&tempBM);
 
     // Let backends know we won't change this, so they don't have to deep copy it defensively.
     tempBM.setImmutable();