cc: Remove support for disabling non-root render surfaces.

cc/output/bsp_tree_perftest.cc

Index: cc/output/bsp_tree_perftest.cc
diff --git a/cc/output/bsp_tree_perftest.cc b/cc/output/bsp_tree_perftest.cc
index a6f2ab677c2d3f0f7a4ae2ff4234778d008d6aa1..8dc2dfc25333ad370ef183490130086d116c6d0d 100644
--- a/cc/output/bsp_tree_perftest.cc
+++ b/cc/output/bsp_tree_perftest.cc
@@ -71,10 +71,8 @@ class BspTreePerfTest : public LayerTreeTest {
     LayerTreeImpl* active_tree = host_impl->active_tree();
     // First build the tree and then we'll start running tests on layersorter
     // itself
-    bool can_render_to_separate_surface = true;
     int max_texture_size = 8096;
-    DoCalcDrawPropertiesImpl(can_render_to_separate_surface, max_texture_size,
-                             active_tree, host_impl);
+    DoCalcDrawPropertiesImpl(max_texture_size, active_tree, host_impl);
 
     LayerImplList base_list;
     BuildLayerImplList(active_tree->root_layer_for_testing(), &base_list);
@@ -104,8 +102,7 @@ class BspTreePerfTest : public LayerTreeTest {
     EndTest();
   }
 
-  void DoCalcDrawPropertiesImpl(bool can_render_to_separate_surface,
-                                int max_texture_size,
+  void DoCalcDrawPropertiesImpl(int max_texture_size,
                                 LayerTreeImpl* active_tree,
                                 LayerTreeHostImpl* host_impl) {
     LayerImplList update_list;
@@ -118,7 +115,6 @@ class BspTreePerfTest : public LayerTreeTest {
         active_tree->OuterViewportScrollLayer(),
         active_tree->elastic_overscroll()->Current(active_tree->IsActiveTree()),
         active_tree->OverscrollElasticityLayer(), max_texture_size,
-        can_render_to_separate_surface,
         host_impl->settings().layer_transforms_should_scale_layer_contents,
         false,  // do not verify_clip_tree_calculation for perf tests
         false,  // do not verify_visible_rect_calculation for perf tests