cc: Cull DrawingDisplayItems outside of the raster playback rect

cc/playback/display_item_list.cc

Index: cc/playback/display_item_list.cc
diff --git a/cc/playback/display_item_list.cc b/cc/playback/display_item_list.cc
index 5ee754ba7605a8b96bd9dd72f266a7b05940ea72..2f1577aca4ca89a8cf6340cf1d1f851ef992488c 100644
--- a/cc/playback/display_item_list.cc
+++ b/cc/playback/display_item_list.cc
@@ -94,13 +94,14 @@ DisplayItemList::~DisplayItemList() {
 
 void DisplayItemList::Raster(SkCanvas* canvas,
                              SkPicture::AbortCallback* callback,
+                             const gfx::Rect& canvas_target_playback_rect,
                              float contents_scale) const {
   DCHECK(ProcessAppendedItemsCalled());
   if (!use_cached_picture_) {
     canvas->save();
     canvas->scale(contents_scale, contents_scale);
     for (auto* item : items_)
-      item->Raster(canvas, callback);
+      item->Raster(canvas, canvas_target_playback_rect, callback);
     canvas->restore();
   } else {
     DCHECK(picture_);
@@ -145,7 +146,7 @@ void DisplayItemList::ProcessAppendedItems() {
 
     if (use_cached_picture_) {
       DCHECK(canvas_);
-      item->Raster(canvas_.get(), NULL);
+      item->Raster(canvas_.get(), gfx::Rect(), NULL);
     }
 
     if (retain_individual_display_items_) {
@@ -218,7 +219,7 @@ DisplayItemList::AsValue() const {
         recorder.beginRecording(layer_rect_.width(), layer_rect_.height());
     canvas->translate(-layer_rect_.x(), -layer_rect_.y());
     canvas->clipRect(gfx::RectToSkRect(layer_rect_));
-    Raster(canvas, NULL, 1.f);
+    Raster(canvas, NULL, gfx::Rect(), 1.f);
     skia::RefPtr<SkPicture> picture =
         skia::AdoptRef(recorder.endRecordingAsPicture());