List all child surfaces (including occluded) in CompositorFrame

cc/quads/render_pass_unittest.cc

Index: cc/quads/render_pass_unittest.cc
diff --git a/cc/quads/render_pass_unittest.cc b/cc/quads/render_pass_unittest.cc
index f00c006e7e9069abec4b0ba6813368f0ae503950..140b7e19c68c919718a89e610ae04ea4cdbcc8d4 100644
--- a/cc/quads/render_pass_unittest.cc
+++ b/cc/quads/render_pass_unittest.cc
@@ -26,7 +26,6 @@ struct RenderPassSize {
   gfx::Rect output_rect;
   gfx::Rect damage_rect;
   bool has_transparent_background;
-  std::vector<SurfaceId> referenced_surfaces;
   std::vector<scoped_ptr<CopyOutputRequest>> copy_callbacks;
 };
 
@@ -48,7 +47,6 @@ static void CompareRenderPassLists(const RenderPassList& expected_list,
     EXPECT_EQ(expected->shared_quad_state_list.size(),
               actual->shared_quad_state_list.size());
     EXPECT_EQ(expected->quad_list.size(), actual->quad_list.size());
-    EXPECT_EQ(expected->referenced_surfaces, actual->referenced_surfaces);
 
     for (auto exp_iter = expected->quad_list.cbegin(),
               act_iter = actual->quad_list.cbegin();
@@ -102,7 +100,6 @@ TEST(RenderPassTest, CopyShouldBeIdenticalExceptIdAndQuads) {
   EXPECT_EQ(pass->damage_rect, copy->damage_rect);
   EXPECT_EQ(pass->has_transparent_background, copy->has_transparent_background);
   EXPECT_EQ(0u, copy->quad_list.size());
-  EXPECT_EQ(0u, copy->referenced_surfaces.size());
 
   // The copy request should not be copied/duplicated.
   EXPECT_EQ(1u, pass->copy_requests.size());