Raster display item lists via a visual rect RTree.

cc/playback/drawing_display_item.cc

Index: cc/playback/drawing_display_item.cc
diff --git a/cc/playback/drawing_display_item.cc b/cc/playback/drawing_display_item.cc
index 05935778582c5d8d11b716610cac185db21816d5..cf0a63c13fb9a2d5b78f2162e6c41be2b3760b8b 100644
--- a/cc/playback/drawing_display_item.cc
+++ b/cc/playback/drawing_display_item.cc
@@ -69,18 +69,7 @@ void DrawingDisplayItem::FromProtobuf(const proto::DisplayItem& proto) {
 }
 
 void DrawingDisplayItem::Raster(SkCanvas* canvas,
-                                const gfx::Rect& canvas_target_playback_rect,
                                 SkPicture::AbortCallback* callback) const {
-  // The canvas_playback_rect can be empty to signify no culling is desired.
-  if (!canvas_target_playback_rect.IsEmpty()) {
-    const SkMatrix& matrix = canvas->getTotalMatrix();
-    const SkRect& cull_rect = picture_->cullRect();
-    SkRect target_rect;
-    matrix.mapRect(&target_rect, cull_rect);
-    if (!target_rect.intersect(gfx::RectToSkRect(canvas_target_playback_rect)))
-      return;
-  }
-
   // SkPicture always does a wrapping save/restore on the canvas, so it is not
   // necessary here.
   if (callback)