switch over clip calls to use SkClipOp instead of SkRegion::Op

Change-Id: I67d23c487b5249bc31d96e3b2393f693c0b2bcff
diff --git a/libs/hwui/utils/TestWindowContext.cpp b/libs/hwui/utils/TestWindowContext.cpp
index fa3e13d..598cd1e 100644
--- a/libs/hwui/utils/TestWindowContext.cpp
+++ b/libs/hwui/utils/TestWindowContext.cpp
@@ -93,8 +93,7 @@
 
     SkCanvas* prepareToDraw() {
         //mCanvas->reset(mSize.width(), mSize.height());
-        mCanvas->clipRect(0, 0, mSize.width(), mSize.height(),
-                               SkRegion::Op::kReplace_Op);
+        mCanvas->clipRect(0, 0, mSize.width(), mSize.height(), kReplace_SkClipOp);
         return mCanvas->asSkCanvas();
     }