Revert[2] "remove SK_SUPPORT_LEGACY_CLIP_REGIONOPS"

This reverts commit a129dfef2aaab0b5995cdf1ab7b2cdd41c29cf72.

BUG=skia:

Change-Id: I717de6e5fcd4516aa684b014b1414b0f82ac2b91
Reviewed-on: https://skia-review.googlesource.com/5722
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
diff --git a/tests/CanvasStateHelpers.cpp b/tests/CanvasStateHelpers.cpp
index 98b5d23..1547d2f 100644
--- a/tests/CanvasStateHelpers.cpp
+++ b/tests/CanvasStateHelpers.cpp
@@ -44,7 +44,7 @@
     canvas->drawColor(SK_ColorBLUE);
     canvas->restore();
 
-    canvas->clipRegion(localRegion, (SkCanvas::ClipOp) clipOp);
+    canvas->clipRegion(localRegion, (SkClipOp) clipOp);
     canvas->drawColor(SK_ColorBLUE);
 }