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

cc/trees/layer_tree_host.cc

 // Copyright 2011 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/layer_tree_host.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 664 matching lines @@
   LayerList update_layer_list;
 
   {
     base::AutoReset<bool> update_property_trees(&in_update_property_trees_,
                                                 true);
     TRACE_EVENT0("cc",
                  "LayerTreeHostInProcess::UpdateLayers::BuildPropertyTrees");
     TRACE_EVENT0(
         TRACE_DISABLED_BY_DEFAULT("cc.debug.cdp-perf"),
         "LayerTreeHostInProcessCommon::ComputeVisibleRectsWithPropertyTrees");
-    bool can_render_to_separate_surface = true;
     PropertyTrees* property_trees = &property_trees_;
     if (!settings_.use_layer_lists) {
       // If use_layer_lists is set, then the property trees should have been
       // built by the client already.
       PropertyTreeBuilder::BuildPropertyTrees(
           root_layer, page_scale_layer, inner_viewport_scroll_layer(),
           outer_viewport_scroll_layer(), overscroll_elasticity_layer(),
           elastic_overscroll_, page_scale_factor_, device_scale_factor_,
           gfx::Rect(device_viewport_size_), identity_transform, property_trees);
       TRACE_EVENT_INSTANT1(
           "cc", "LayerTreeHostInProcess::UpdateLayers_BuiltPropertyTrees",
           TRACE_EVENT_SCOPE_THREAD, "property_trees",
           property_trees->AsTracedValue());
     } else {
       TRACE_EVENT_INSTANT1(
           "cc", "LayerTreeHostInProcess::UpdateLayers_ReceivedPropertyTrees",
           TRACE_EVENT_SCOPE_THREAD, "property_trees",
           property_trees->AsTracedValue());
     }
-    draw_property_utils::UpdatePropertyTrees(this, property_trees,
-                                             can_render_to_separate_surface);
+    draw_property_utils::UpdatePropertyTrees(this, property_trees);
     draw_property_utils::FindLayersThatNeedUpdates(this, property_trees,
                                                    &update_layer_list);
   }
 
   for (const auto& layer : update_layer_list)
     layer->SavePaintProperties();
 
   bool content_is_suitable_for_gpu = true;
   bool did_paint_content =
       PaintContent(update_layer_list, &content_is_suitable_for_gpu);
@@ skipping 722 matching lines @@
 void LayerTreeHost::SetNeedsDisplayOnAllLayers() {
   for (auto* layer : *this)
     layer->SetNeedsDisplay();
 }
 
 void LayerTreeHost::SetHasCopyRequest(bool has_copy_request) {
   has_copy_request_ = has_copy_request;
 }
 
 }  // namespace cc