Revert[2] of guard to remove DrawBitmapRectFlags

This reverts commit 91110195a2eee170c11885da9d16f94b00a39f87.

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/1240753003
diff --git a/bench/BitmapRectBench.cpp b/bench/BitmapRectBench.cpp
index d3a7574..061bfe8 100644
--- a/bench/BitmapRectBench.cpp
+++ b/bench/BitmapRectBench.cpp
@@ -96,7 +96,8 @@
         paint.setAlpha(fAlpha);
 
         for (int i = 0; i < loops; i++) {
-            canvas->drawBitmapRectToRect(fBitmap, &fSrcR, fDstR, &paint);
+            canvas->drawBitmapRect(fBitmap, &fSrcR, fDstR, &paint,
+                                   SkCanvas::kStrict_SrcRectConstraint);
         }
     }