WIP - compositor worker mega patch.

cc/trees/property_tree_builder.cc

Index: cc/trees/property_tree_builder.cc
diff --git a/cc/trees/property_tree_builder.cc b/cc/trees/property_tree_builder.cc
index 85bdbececf615f892b1b4e1b89399b9a530ab733..dd0472a1476fac4c0252f9ed5e348a95ea1601bb 100644
--- a/cc/trees/property_tree_builder.cc
+++ b/cc/trees/property_tree_builder.cc
@@ -9,6 +9,7 @@
 #include <map>
 #include <set>
 
+#include "cc/animation/mutable_properties.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
@@ -222,11 +223,15 @@ bool AddTransformNodeIfNeeded(
   const bool has_any_transform_animation =
       layer->HasAnyAnimationTargetingProperty(Animation::TRANSFORM);
 
+  const bool has_proxied_transform_related_property =
+      layer->mutable_properties() & kMutablePropertyTransformRelated;
+
   const bool has_surface = created_render_surface;
 
   bool requires_node = is_root || is_scrollable || has_significant_transform ||
                        has_any_transform_animation || has_surface || is_fixed ||
-                       is_page_scale_layer || is_overscroll_elasticity_layer;
+                       is_page_scale_layer || is_overscroll_elasticity_layer ||
+                       has_proxied_transform_related_property;
 
   LayerType* transform_parent = GetTransformParent(data_from_ancestor, layer);
   DCHECK(is_root || transform_parent);
@@ -550,6 +555,8 @@ bool AddEffectNodeIfNeeded(
   const bool is_root = !layer->parent();
   const bool has_transparency = layer->opacity() != 1.f;
   const bool has_animated_opacity = IsAnimatingOpacity(layer);
+  const bool has_proxied_opacity =
+      layer->mutable_properties() & kMutablePropertyOpacity;
   const bool should_create_render_surface = ShouldCreateRenderSurface(
       layer, data_from_ancestor.compound_transform_since_render_target,
       data_from_ancestor.axis_align_since_render_target);
@@ -557,7 +564,7 @@ bool AddEffectNodeIfNeeded(
       layer->AnimationsPreserveAxisAlignment();
 
   bool requires_node = is_root || has_transparency || has_animated_opacity ||
-                       should_create_render_surface;
+                       has_proxied_opacity || should_create_render_surface;
 
   int parent_id = data_from_ancestor.effect_tree_parent;