Revert of Remove cullRect() from PaintOpBuffer.

cc/paint/record_paint_canvas.cc

Index: cc/paint/record_paint_canvas.cc
diff --git a/cc/paint/record_paint_canvas.cc b/cc/paint/record_paint_canvas.cc
index a635474a372be797e26a60cc88cb0f56bb645577..258b571bf123871612d53fb3f0cdc73c6169af6f 100644
--- a/cc/paint/record_paint_canvas.cc
+++ b/cc/paint/record_paint_canvas.cc
@@ -15,9 +15,7 @@
 
 namespace cc {
 
-RecordPaintCanvas::RecordPaintCanvas(PaintOpBuffer* buffer,
-                                     const SkRect& bounds)
-    : buffer_(buffer), recording_bounds_(bounds) {
+RecordPaintCanvas::RecordPaintCanvas(PaintOpBuffer* buffer) : buffer_(buffer) {
   DCHECK(buffer_);
 }
 
@@ -354,18 +352,20 @@ SkNoDrawCanvas* RecordPaintCanvas::GetCanvas() {
   if (canvas_)
     return &*canvas_;
 
+  SkRect recording_bounds = buffer_->cullRect();
+
   // Size the canvas to be large enough to contain the |recording_bounds|, which
   // may not be positioned at th origin.
-  SkIRect enclosing_rect = recording_bounds_.roundOut();
+  SkIRect enclosing_rect = recording_bounds.roundOut();
   canvas_.emplace(enclosing_rect.right(), enclosing_rect.bottom());
 
   // This is part of the "recording canvases have a size, but why" dance.
   // By creating a canvas of size (right x bottom) and then clipping it,
   // It makes getDeviceClipBounds return the original cull rect, which code
   // in GraphicsContextCanvas on Mac expects.  (Just creating an SkNoDrawCanvas
-  // with the recording_bounds_ makes a canvas of size (width x height) instead
+  // with the cull_rect makes a canvas of size (width x height) instead
   // which is incorrect.  SkRecorder cheats with private resetForNextCanvas.
-  canvas_->clipRect(recording_bounds_, SkClipOp::kIntersect, false);
+  canvas_->clipRect(recording_bounds, SkClipOp::kIntersect, false);
   return &*canvas_;
 }