abstract name of clipping ops, to transtion to a more restricted set

SkRegion::Op --> SkCanvas::ClipOp (alias) --> SkClipOp

pre-CL needed in chrome : https://codereview.chromium.org/2355583002/

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2355483002

Review-Url: https://codereview.chromium.org/2355483002
diff --git a/tools/debugger/SkObjectParser.h b/tools/debugger/SkObjectParser.h
index 9bdfad5..11baf12 100644
--- a/tools/debugger/SkObjectParser.h
+++ b/tools/debugger/SkObjectParser.h
@@ -101,7 +101,7 @@
         Returns a string representation of the SkRegion enum.
         @param op  SkRegion::op enum
      */
-    static SkString* RegionOpToString(SkRegion::Op op);
+    static SkString* ClipOpToString(SkCanvas::ClipOp op);
 
     /**
         Returns a string representation of the SkRegion.