cc : Don't draw animating layers with singular screen space transform

cc/layers/picture_layer_impl.cc

 // Copyright 2012 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/layers/picture_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1375 matching lines @@
 WhichTree PictureLayerImpl::GetTree() const {
   return layer_tree_impl()->IsActiveTree() ? ACTIVE_TREE : PENDING_TREE;
 }
 
 bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
   return !layer_tree_impl()->IsRecycleTree();
 }
 
 bool PictureLayerImpl::HasValidTilePriorities() const {
   return IsOnActiveOrPendingTree() &&
-         is_drawn_render_surface_layer_list_member();
+         (is_drawn_render_surface_layer_list_member() ||
+          raster_even_if_not_in_rsll());
 }
 
 void PictureLayerImpl::InvalidateRegionForImages(
     const ImageIdFlatSet& images_to_invalidate) {
   TRACE_EVENT_BEGIN0("cc", "PictureLayerImpl::InvalidateRegionForImages");
 
   InvalidationRegion image_invalidation;
   for (auto image_id : images_to_invalidate)
     image_invalidation.Union(raster_source_->GetRectForImage(image_id));
   Region invalidation;
   image_invalidation.Swap(&invalidation);
 
   if (invalidation.IsEmpty()) {
     TRACE_EVENT_END1("cc", "PictureLayerImpl::InvalidateRegionForImages",
                      "Invalidation", invalidation.ToString());
     return;
   }
 
   invalidation_.Union(invalidation);
   tilings_->UpdateTilingsForImplSideInvalidation(invalidation);
   SetNeedsPushProperties();
   TRACE_EVENT_END1("cc", "PictureLayerImpl::InvalidateRegionForImages",
                    "Invalidation", invalidation.ToString());
 }
 
 }  // namespace cc