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/src/svg/SkSVGDevice.cpp b/src/svg/SkSVGDevice.cpp
index b9f1424..b8f8938 100644
--- a/src/svg/SkSVGDevice.cpp
+++ b/src/svg/SkSVGDevice.cpp
@@ -731,7 +731,7 @@
     SkClipStack adjustedClipStack;
     if (srcOrNull && *srcOrNull != SkRect::Make(bm.bounds())) {
         adjustedClipStack = *draw.fClipStack;
-        adjustedClipStack.clipRect(dst, *draw.fMatrix, SkCanvas::kIntersect_Op,
+        adjustedClipStack.clipRect(dst, *draw.fMatrix, kIntersect_SkClipOp,
                                    paint.isAntiAlias());
         adjustedDraw.fClipStack = &adjustedClipStack;
     }