use ClipOp instead of SkRegion for clipping

tests/DeferredCanvasTest.cpp

Index: tests/DeferredCanvasTest.cpp
diff --git a/tests/DeferredCanvasTest.cpp b/tests/DeferredCanvasTest.cpp
index 043fe3355756a57f57c868ed64ae34d1952fe2d4..5eeebcc6db80ab33c59f08b6a742dbc8fa603efc 100644
--- a/tests/DeferredCanvasTest.cpp
+++ b/tests/DeferredCanvasTest.cpp
@@ -365,7 +365,7 @@ static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
     // frame
     {
         canvas->save();
-        canvas->clipRect(partialRect, SkRegion::kIntersect_Op, false);
+        canvas->clipRect(partialRect);
         SkPaint paint;
         paint.setStyle(SkPaint::kFill_Style);
         paint.setAlpha(255);
@@ -380,7 +380,7 @@ static void TestDeferredCanvasFreshFrame(skiatest::Reporter* reporter) {
         paint.setAlpha(255);
         SkPath path;
         path.addCircle(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(2));
-        canvas->clipPath(path, SkRegion::kIntersect_Op, false);
+        canvas->clipPath(path);
         canvas->drawRect(fullRect, paint);
         canvas->restore();
         REPORTER_ASSERT(reporter, !canvas->isFreshFrame());
@@ -856,7 +856,7 @@ static void TestDeferredCanvasGetCanvasSize(skiatest::Reporter* reporter) {
 
         // Verify that clear, clip and draw the canvas will not change its size
         canvas->clear(0x00000000);
-        canvas->clipRect(clip, SkRegion::kIntersect_Op, false);
+        canvas->clipRect(clip);
         canvas->drawRect(rect, paint);
         REPORTER_ASSERT(reporter, size == canvas->getCanvasSize());