List all child surfaces (including occluded) in CompositorFrame

content/common/cc_messages.cc

Index: content/common/cc_messages.cc
diff --git a/content/common/cc_messages.cc b/content/common/cc_messages.cc
index 34b5614dd073a6acf603f0ef7790d5e1ac2697b6..992ff8a27a1532c7c2c67e5733c44cdfddf41ef3 100644
--- a/content/common/cc_messages.cc
+++ b/content/common/cc_messages.cc
@@ -300,7 +300,6 @@ void ParamTraits<cc::RenderPass>::Write(
   WriteParam(m, p.damage_rect);
   WriteParam(m, p.transform_to_root_target);
   WriteParam(m, p.has_transparent_background);
-  WriteParam(m, p.referenced_surfaces);
   WriteParam(m, p.quad_list.size());
 
   cc::SharedQuadStateList::ConstIterator shared_quad_state_iter =
@@ -384,9 +383,6 @@ static size_t ReserveSizeForRenderPassWrite(const cc::RenderPass& p) {
 
   // The largest quad type, verified by a unit test.
   to_reserve += p.quad_list.size() * cc::LargestDrawQuadSize();
-
-  // The actual list of referenced surfaces.
-  to_reserve += p.referenced_surfaces.size() * sizeof(cc::SurfaceId);
   return to_reserve;
 }
 
@@ -408,14 +404,12 @@ bool ParamTraits<cc::RenderPass>::Read(const Message* m,
   gfx::Rect damage_rect;
   gfx::Transform transform_to_root_target;
   bool has_transparent_background;
-  std::vector<cc::SurfaceId> referenced_surfaces;
   size_t quad_list_size;
 
   if (!ReadParam(m, iter, &id) || !ReadParam(m, iter, &output_rect) ||
       !ReadParam(m, iter, &damage_rect) ||
       !ReadParam(m, iter, &transform_to_root_target) ||
       !ReadParam(m, iter, &has_transparent_background) ||
-      !ReadParam(m, iter, &referenced_surfaces) ||
       !ReadParam(m, iter, &quad_list_size))
     return false;
 
@@ -424,7 +418,6 @@ bool ParamTraits<cc::RenderPass>::Read(const Message* m,
             damage_rect,
             transform_to_root_target,
             has_transparent_background);
-  p->referenced_surfaces.swap(referenced_surfaces);
 
   for (size_t i = 0; i < quad_list_size; ++i) {
     cc::DrawQuad::Material material;
@@ -513,8 +506,6 @@ void ParamTraits<cc::RenderPass>::Log(
   l->append(", ");
   LogParam(p.has_transparent_background, l);
   l->append(", ");
-  LogParam(p.referenced_surfaces, l);
-  l->append(", ");
 
   l->append("[");
   for (const auto& shared_quad_state : p.shared_quad_state_list) {