cc : Stop pushing layers from hidden subtrees at commit

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1617 matching lines @@
     if (settings_.enable_surface_synchronization) {
       if (surface_layer_impl->fallback_surface_info().is_valid()) {
         metadata.referenced_surfaces.push_back(
             surface_layer_impl->fallback_surface_info().id());
       }
     } else {
       metadata.referenced_surfaces.push_back(
           surface_layer_impl->primary_surface_info().id());
     }
   }
+
+  for (auto* surface_id : *active_tree_->HiddenSurfaceLayerIds()) {
+    metadata.referenced_surfaces.push_back(*surface_id);
+  }
+
   if (!InnerViewportScrollLayer())
     return metadata;
 
   metadata.root_overflow_x_hidden |=
       !InnerViewportScrollLayer()->user_scrollable_horizontal();
   metadata.root_overflow_y_hidden |=
       !InnerViewportScrollLayer()->user_scrollable_vertical();
 
   // TODO(miletus) : Change the metadata to hold ScrollOffset.
   metadata.root_scroll_offset =
@@ skipping 2700 matching lines @@
 
 void LayerTreeHostImpl::ShowScrollbarsForImplScroll(ElementId element_id) {
   if (!element_id)
     return;
   if (ScrollbarAnimationController* animation_controller =
           ScrollbarAnimationControllerForElementId(element_id))
     animation_controller->DidScrollUpdate();
 }
 
 }  // namespace cc