Track slow paths in DisplayItemList

cc/paint/paint_op_buffer.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/paint/paint_op_buffer.h"
 
 #include "base/containers/stack_container.h"
 #include "cc/paint/display_item_list.h"
 #include "cc/paint/paint_record.h"
 #include "third_party/skia/include/core/SkAnnotation.h"
@@ skipping 436 matching lines @@
 }
 
 void PaintOp::RasterWithAlpha(SkCanvas* canvas, uint8_t alpha) const {
   g_raster_alpha_functions[type](this, canvas, alpha);
 }
 
 int ClipPathOp::CountSlowPaths() const {
   return antialias && !path.isConvex() ? 1 : 0;
 }
 
+int DrawDisplayItemListOp::CountSlowPaths() const {
+  return list->NumSlowPaths();
+}
+
 int DrawLineOp::CountSlowPaths() const {
   if (const SkPathEffect* effect = flags.getPathEffect()) {
     SkPathEffect::DashInfo info;
     SkPathEffect::DashType dashType = effect->asADash(&info);
     if (flags.getStrokeCap() != PaintFlags::kRound_Cap &&
         dashType == SkPathEffect::kDash_DashType && info.fCount == 2) {
       // The PaintFlags will count this as 1, so uncount that here as
       // this kind of line is special cased and not slow.
       return -1;
     }
@@ skipping 266 matching lines @@
   return std::make_pair(op, skip);
 }
 
 void PaintOpBuffer::ShrinkToFit() {
   if (!used_ || used_ == reserved_)
     return;
   ReallocBuffer(used_);
 }
 
 }  // namespace cc