allow clip calls w/o op param, remove unnecessary kReplace ops

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2357333002

Review-Url: https://codereview.chromium.org/2357333002
diff --git a/gm/aaclip.cpp b/gm/aaclip.cpp
index d657669..26a25c1 100644
--- a/gm/aaclip.cpp
+++ b/gm/aaclip.cpp
@@ -85,7 +85,7 @@
     canvas->drawRect(target, borderPaint);
     target.inset(SkIntToScalar(2), SkIntToScalar(2));
     canvas->drawRect(target, backgroundPaint);
-    canvas->clipRect(target, SkCanvas::kIntersect_Op, true);
+    canvas->clipRect(target, true);
     target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
     canvas->drawRect(target, foregroundPaint);
     canvas->restore();
diff --git a/gm/bigblurs.cpp b/gm/bigblurs.cpp
index ee5ccd1..0acd190 100644
--- a/gm/bigblurs.cpp
+++ b/gm/bigblurs.cpp
@@ -80,7 +80,7 @@
                                                        SkIntToScalar(kCloseUpSize),
                                                        SkIntToScalar(kCloseUpSize));
 
-                    canvas->clipRect(clipRect, SkCanvas::kReplace_Op, false);
+                    canvas->clipRect(clipRect);
 
                     canvas->translate(desiredX-origins[k].fX,
                                       desiredY-origins[k].fY);
diff --git a/gm/circularclips.cpp b/gm/circularclips.cpp
index 39be1a5..f505310 100644
--- a/gm/circularclips.cpp
+++ b/gm/circularclips.cpp
@@ -54,8 +54,8 @@
         canvas->save();
         canvas->scale(10, 10);
         canvas->translate(-((fX1 + fX2)/2 - fR), -(fY - 2*fR/3));
-        canvas->clipPath(fCircle1, SkCanvas::kReplace_Op, true);
-        canvas->clipPath(fCircle2, SkCanvas::kIntersect_Op, true);
+        canvas->clipPath(fCircle1, true);
+        canvas->clipPath(fCircle2, true);
 
         canvas->drawRect(rect, fillPaint);
 
@@ -73,7 +73,7 @@
             for (size_t op = 0; op < SK_ARRAY_COUNT(ops); op++) {
                 canvas->save();
 
-                canvas->clipPath(fCircle1, SkCanvas::kReplace_Op);
+                canvas->clipPath(fCircle1);
                 canvas->clipPath(fCircle2, ops[op]);
 
                 canvas->drawRect(rect, fillPaint);
diff --git a/gm/clip_strokerect.cpp b/gm/clip_strokerect.cpp
index 814455d..34adf8a 100644
--- a/gm/clip_strokerect.cpp
+++ b/gm/clip_strokerect.cpp
@@ -36,7 +36,7 @@
         SkRect rect = SkRect::MakeXYWH(20, 0, 100, 20);
 
         canvas->save();
-        canvas->clipRect(rect, SkCanvas::kReplace_Op, true);
+        canvas->clipRect(rect, true);
         canvas->drawRect(r, p);
         canvas->restore();
 
@@ -54,7 +54,7 @@
         SkRect rect2 = SkRect::MakeXYWH(20, 120, 100, 19);
 
         canvas->save();
-        canvas->clipRect(rect2, SkCanvas::kReplace_Op, true);
+        canvas->clipRect(rect2, true);
         canvas->drawRect(r2, p);
         canvas->restore();
 
diff --git a/gm/complexclip.cpp b/gm/complexclip.cpp
index fb94957..2f8fa3d 100644
--- a/gm/complexclip.cpp
+++ b/gm/complexclip.cpp
@@ -130,7 +130,7 @@
                                       SkPath::kEvenOdd_FillType);
                     clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
                                       SkPath::kEvenOdd_FillType);
-                    canvas->clipPath(clipA, SkCanvas::kIntersect_Op, fDoAAClip);
+                    canvas->clipPath(clipA, fDoAAClip);
                     canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip);
 
                     // In the inverse case we need to prevent the draw from covering the whole
diff --git a/gm/complexclip3.cpp b/gm/complexclip3.cpp
index fd8cd35..59c78ec 100644
--- a/gm/complexclip3.cpp
+++ b/gm/complexclip3.cpp
@@ -84,7 +84,7 @@
                                                SkPath::kEvenOdd_FillType);
                         secondClip->setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
                                                 SkPath::kEvenOdd_FillType);
-                        canvas->clipPath(*firstClip, SkCanvas::kIntersect_Op, doAAA);
+                        canvas->clipPath(*firstClip, doAAA);
                         canvas->clipPath(*secondClip, gOps[op].fOp, doAAB);
 
                         // draw rect clipped
diff --git a/gm/distantclip.cpp b/gm/distantclip.cpp
index f4931dd..24fbaca 100644
--- a/gm/distantclip.cpp
+++ b/gm/distantclip.cpp
@@ -39,7 +39,7 @@
         SkRect r = SkRect::MakeXYWH(-kExtents, kOffset - kExtents, 2 * kExtents, 2 * kExtents);
         SkPath p;
         p.addRoundRect(r, 5, 5);
-        rec->clipPath(p, SkCanvas::kIntersect_Op, true);
+        rec->clipPath(p, true);
         rec->drawColor(SK_ColorGREEN);
         rec->restore();
         sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());
diff --git a/gm/imagefilters.cpp b/gm/imagefilters.cpp
index 3e8d39a..e9f54a3 100644
--- a/gm/imagefilters.cpp
+++ b/gm/imagefilters.cpp
@@ -122,7 +122,7 @@
     for (int i = 0; i < count; ++i) {
         canvas->save();
         SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20);
-        canvas->clipRRect(rr, SkCanvas::kIntersect_Op, true);
+        canvas->clipRRect(rr, true);
         canvas->saveLayer({ &rr.getBounds(), nullptr, filters[i].get(), 0 });
         canvas->drawColor(0x40FFFFFF);
         canvas->restore();
diff --git a/gm/path_stroke_with_zero_length.cpp b/gm/path_stroke_with_zero_length.cpp
index 9c05541..0f6d200 100644
--- a/gm/path_stroke_with_zero_length.cpp
+++ b/gm/path_stroke_with_zero_length.cpp
@@ -167,7 +167,7 @@
         } else {
             fClipS.transform(clipM, &clip);
         }
-        canvas->clipPath(clip, SkCanvas::kIntersect_Op, true);
+        canvas->clipPath(clip, true);
         canvas->scale(scale, scale);
         canvas->drawBitmap(offscreen, (bounds.fLeft - 17) / scale,
                     (bounds.fTop - 20 + 420) / scale);
@@ -180,7 +180,7 @@
             clipM.postTranslate(bounds.fLeft - 17 - 275, bounds.fTop - 24.5f + 420);
             SkPath clip;
             fClipR.transform(clipM, &clip);
-            canvas->clipPath(clip, SkCanvas::kIntersect_Op, true);
+            canvas->clipPath(clip, true);
             canvas->scale(10.f, 10.f);
             canvas->drawBitmap(offscreen, (bounds.fLeft - 17 - 275
                     + (index >= 5 ? 5 : 0)) / scale, (bounds.fTop - 20 + 420) / scale);
diff --git a/gm/pathopsinverse.cpp b/gm/pathopsinverse.cpp
index 176bc76..918666c 100644
--- a/gm/pathopsinverse.cpp
+++ b/gm/pathopsinverse.cpp
@@ -75,7 +75,7 @@
                 two.addRect(40, 40, 100, 100);
                 canvas->save();
                 canvas->translate(0, SkIntToScalar(yPos));
-                canvas->clipRect(SkRect::MakeWH(110, 110), SkCanvas::kIntersect_Op, true);
+                canvas->clipRect(SkRect::MakeWH(110, 110), true);
                 canvas->drawPath(one, fOnePaint);
                 canvas->drawPath(one, fOutlinePaint);
                 canvas->drawPath(two, fTwoPaint);
@@ -87,7 +87,7 @@
                     Op(one, two, (SkPathOp) op, &result);
                     canvas->save();
                     canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
-                    canvas->clipRect(SkRect::MakeWH(110, 110), SkCanvas::kIntersect_Op, true);
+                    canvas->clipRect(SkRect::MakeWH(110, 110), true);
                     canvas->drawPath(result, fOpPaint[op]);
                     canvas->drawPath(result, fOutlinePaint);
                     canvas->restore();
diff --git a/gm/pathopsskpclip.cpp b/gm/pathopsskpclip.cpp
index 77ba84c..18be681 100644
--- a/gm/pathopsskpclip.cpp
+++ b/gm/pathopsskpclip.cpp
@@ -42,9 +42,9 @@
             SkIntToScalar(700)
         };
         p.addRoundRect(r, SkIntToScalar(50), SkIntToScalar(50));
-        rec->clipPath(p, SkCanvas::kIntersect_Op, true);
+        rec->clipPath(p, true);
         rec->translate(SkIntToScalar(250), SkIntToScalar(250));
-        rec->clipPath(p, SkCanvas::kIntersect_Op, true);
+        rec->clipPath(p, true);
         rec->drawColor(0xffff0000);
         sk_sp<SkPicture> pict(recorder.finishRecordingAsPicture());
 
diff --git a/gm/rrectclipdrawpaint.cpp b/gm/rrectclipdrawpaint.cpp
index 74b5783..c997f84 100644
--- a/gm/rrectclipdrawpaint.cpp
+++ b/gm/rrectclipdrawpaint.cpp
@@ -21,14 +21,14 @@
 
     const SkRect layerRect = SkRect::MakeWH(256.f, 256.f);
     canvas->saveLayer(layerRect, nullptr);
-    canvas->clipRRect(rrect, SkCanvas::kIntersect_Op, true);
+    canvas->clipRRect(rrect, true);
     canvas->drawPaint(p);
     canvas->restore();
 
     canvas->concat(zoomOut);
     p.setColor(SK_ColorBLUE);
     canvas->saveLayer(layerRect, nullptr);
-    canvas->clipRRect(rrect, SkCanvas::kIntersect_Op, false);
+    canvas->clipRRect(rrect, false);
     canvas->drawPaint(p);
     canvas->restore();
 
@@ -38,7 +38,7 @@
                                              SkShader::kClamp_TileMode));
     canvas->concat(zoomOut);
     canvas->saveLayer(layerRect, nullptr);
-    canvas->clipRRect(rrect, SkCanvas::kIntersect_Op, true);
+    canvas->clipRRect(rrect, true);
     canvas->drawPaint(p);
     canvas->restore();
 
@@ -47,7 +47,7 @@
                                              SkShader::kClamp_TileMode));
     canvas->concat(zoomOut);
     canvas->saveLayer(layerRect, nullptr);
-    canvas->clipRRect(rrect, SkCanvas::kIntersect_Op, false);
+    canvas->clipRRect(rrect, false);
     canvas->drawPaint(p);
     canvas->restore();
 }
diff --git a/gm/rrects.cpp b/gm/rrects.cpp
index 46c1c67..1f47f77 100644
--- a/gm/rrects.cpp
+++ b/gm/rrects.cpp
@@ -124,7 +124,7 @@
 #endif
                     } else if (kBW_Clip_Type == fType || kAA_Clip_Type == fType) {
                         bool aaClip = (kAA_Clip_Type == fType);
-                        canvas->clipRRect(fRRects[curRRect], SkCanvas::kReplace_Op, aaClip);
+                        canvas->clipRRect(fRRects[curRRect], aaClip);
                         canvas->drawRect(kMaxTileBound, paint);
                     } else {
                         canvas->drawRRect(fRRects[curRRect], paint);
diff --git a/gm/samplerstress.cpp b/gm/samplerstress.cpp
index 83916bc..e36e621 100644
--- a/gm/samplerstress.cpp
+++ b/gm/samplerstress.cpp
@@ -108,7 +108,7 @@
         SkPath path;
         path.addRoundRect(temp, SkIntToScalar(5), SkIntToScalar(5));
 
-        canvas->clipPath(path, SkCanvas::kReplace_Op, true); // AA is on
+        canvas->clipPath(path, true); // AA is on
 
         canvas->drawText("M", 1,
                          SkIntToScalar(100), SkIntToScalar(100),
diff --git a/gm/simpleaaclip.cpp b/gm/simpleaaclip.cpp
index 87dc687..9a8fe61 100644
--- a/gm/simpleaaclip.cpp
+++ b/gm/simpleaaclip.cpp
@@ -106,11 +106,11 @@
         // create the clip mask with the supplied boolean op
         if (kPath_GeomType == fGeomType) {
             // path-based case
-            canvas->clipPath(fBasePath, SkCanvas::kReplace_Op, true);
+            canvas->clipPath(fBasePath, true);
             canvas->clipPath(fRectPath, op, true);
         } else {
             // rect-based case
-            canvas->clipRect(fBase, SkCanvas::kReplace_Op, true);
+            canvas->clipRect(fBase, true);
             canvas->clipRect(fRect, op, true);
         }
 
diff --git a/gm/skbug1719.cpp b/gm/skbug1719.cpp
index 2fa6be8..3c49aaa 100644
--- a/gm/skbug1719.cpp
+++ b/gm/skbug1719.cpp
@@ -65,6 +65,6 @@
                                    SkBlurMaskFilter::kHighQuality_BlurFlag));
         paint.setColorFilter(SkColorFilter::MakeModeFilter(0xBFFFFFFF, SkXfermode::kSrcIn_Mode));
 
-        canvas->clipPath(clipPath, SkCanvas::kIntersect_Op, true);
+        canvas->clipPath(clipPath, true);
         canvas->drawPath(drawPath, paint);
 }