Add sticky nodes affected by inner and outer viewport bounds deltas.

cc/trees/property_tree_builder.cc

 // Copyright 2014 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/property_tree_builder.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
@@ skipping 687 matching lines @@
 
   if (StickyPositionConstraint(layer).is_sticky) {
     StickyPositionNodeData* sticky_data =
         data_for_children->property_trees->transform_tree.StickyPositionData(
             node->id);
     sticky_data->constraints = StickyPositionConstraint(layer);
     sticky_data->scroll_ancestor = GetScrollParentId(data_from_ancestor, layer);
     ScrollNode* scroll_ancestor =
         data_for_children->property_trees->scroll_tree.Node(
             sticky_data->scroll_ancestor);
-    if (scroll_ancestor->is_inner_viewport_scroll_layer) {
-      data_for_children->property_trees->transform_tree
-          .AddNodeAffectedByInnerViewportBoundsDelta(node->id);
+    if (sticky_data->constraints.is_anchored_right ||
+        sticky_data->constraints.is_anchored_bottom) {
+      if (scroll_ancestor->is_inner_viewport_scroll_layer) {
+        data_for_children->property_trees->transform_tree
+            .AddNodeAffectedByInnerViewportBoundsDelta(node->id);

[ajuma, 2016/10/28 17:10:41]

As discussed, please rename TransformNode::affected_by_.... to
TransformNode::moved_by...., since these are no longer symmetric with the the
nodes_affected_by... sets. Please also add a comment about this.

[flackr, 2016/10/28 17:24:51]

Done.

+      } else if (scroll_ancestor->is_outer_viewport_scroll_layer) {
+        data_for_children->property_trees->transform_tree
+            .AddNodeAffectedByOuterViewportBoundsDelta(node->id);
+      }
     }
     sticky_data->main_thread_offset =
         layer->position().OffsetFromOrigin() -
         sticky_data->constraints.parent_relative_sticky_box_offset
             .OffsetFromOrigin();
   }
 
   node->needs_local_transform_update = true;
   data_from_ancestor.property_trees->transform_tree.UpdateTransforms(node->id);
 
@@ skipping 765 matching lines @@
     color = SkColorSetA(color, 255);
   BuildPropertyTreesTopLevelInternal(
       root_layer, page_scale_layer, inner_viewport_scroll_layer,
       outer_viewport_scroll_layer, overscroll_elasticity_layer,
       elastic_overscroll, page_scale_factor, device_scale_factor, viewport,
       device_transform, property_trees, color);
   property_trees->ResetCachedData();
 }
 
 }  // namespace cc