Remove cullRect() from PaintOpBuffer.

cc/paint/paint_recorder.cc

Index: cc/paint/paint_recorder.cc
diff --git a/cc/paint/paint_recorder.cc b/cc/paint/paint_recorder.cc
index 2ed17c74e29d02ee54f07a326ebc63cdcea935e6..20f5cacd2d670fb4971e64085b1d3f1ccd7f48c0 100644
--- a/cc/paint/paint_recorder.cc
+++ b/cc/paint/paint_recorder.cc
@@ -13,8 +13,8 @@ PaintRecorder::PaintRecorder() = default;
 PaintRecorder::~PaintRecorder() = default;
 
 PaintCanvas* PaintRecorder::beginRecording(const SkRect& bounds) {
-  buffer_.reset(new PaintOpBuffer(bounds));
-  canvas_.emplace(buffer_.get());
+  buffer_ = sk_make_sp<PaintOpBuffer>();
+  canvas_.emplace(buffer_.get(), bounds);
   return getRecordingCanvas();
 }