Revert of Remove cullRect() from PaintOpBuffer.

cc/paint/paint_op_buffer.h

 // 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.
 
 #ifndef CC_PAINT_PAINT_OP_BUFFER_H_
 #define CC_PAINT_PAINT_OP_BUFFER_H_
 
 #include <stdint.h>
 
 #include "base/logging.h"
@@ skipping 754 matching lines @@
 using LargestPaintOp = DrawDRRectOp;
 
 class CC_PAINT_EXPORT PaintOpBuffer : public SkRefCnt {
  public:
   enum { kInitialBufferSize = 4096 };
   // It's not necessarily the case that the op with the maximum alignment
   // requirements is also the biggest op, but for now that's true.
   static constexpr size_t PaintOpAlign = ALIGNOF(DrawDRRectOp);
 
   PaintOpBuffer();
+  explicit PaintOpBuffer(const SkRect& cull_rect);
   ~PaintOpBuffer() override;
 
   void Reset();
 
   void playback(SkCanvas* canvas) const;
   void playback(SkCanvas* canvas, SkPicture::AbortCallback* callback) const;
 
   // Returns the size of the paint op buffer. That is, the number of ops
   // contained in it.
   size_t size() const { return op_count_; }
   // Returns the number of bytes used by the paint op buffer.
   size_t bytes_used() const {
     return sizeof(*this) + reserved_ + subrecord_bytes_used_;
   }
   int numSlowPaths() const { return num_slow_paths_; }
   bool HasDiscardableImages() const { return has_discardable_images_; }
 
   // Resize the PaintOpBuffer to exactly fit the current amount of used space.
   void ShrinkToFit();
 
+  const SkRect& cullRect() const { return cull_rect_; }
+
   PaintOp* GetFirstOp() const {
     return const_cast<PaintOp*>(first_op_.data_as<PaintOp>());
   }
 
   template <typename T, typename... Args>
   void push(Args&&... args) {
     static_assert(std::is_convertible<T, PaintOp>::value, "T not a PaintOp.");
     static_assert(!std::is_convertible<T, PaintOpWithData>::value,
                   "Type needs to use push_with_data");
     push_internal<T>(0, std::forward<Args>(args)...);
@@ skipping 134 matching lines @@
   std::unique_ptr<char, base::AlignedFreeDeleter> data_;
   size_t used_ = 0;
   size_t reserved_ = 0;
   size_t op_count_ = 0;
 
   // Record paths for veto-to-msaa for gpu raster.
   int num_slow_paths_ = 0;
   // Record additional bytes used by referenced sub-records and display lists.
   size_t subrecord_bytes_used_ = 0;
   bool has_discardable_images_ = false;
+  SkRect cull_rect_;
 
   DISALLOW_COPY_AND_ASSIGN(PaintOpBuffer);
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_PAINT_OP_BUFFER_H_