Clear renderer compositor trees if new page does not render in 4 seconds

cc/trees/layer_tree_host_impl.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_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1178 matching lines @@
 }
 
 void LayerTreeHostImpl::EvictTexturesForTesting() {
   UpdateTileManagerMemoryPolicy(ManagedMemoryPolicy(0));
 }
 
 void LayerTreeHostImpl::BlockNotifyReadyToActivateForTesting(bool block) {
   NOTREACHED();
 }
 
-void LayerTreeHostImpl::ResetTreesForTesting() {
+void LayerTreeHostImpl::ResetTrees() {
   if (active_tree_)
     active_tree_->DetachLayers();
   active_tree_ =
       base::MakeUnique<LayerTreeImpl>(this, active_tree()->page_scale_factor(),
                                       active_tree()->top_controls_shown_ratio(),
                                       active_tree()->elastic_overscroll());
   active_tree_->property_trees()->is_active = true;
   if (pending_tree_)
     pending_tree_->DetachLayers();
   pending_tree_ = nullptr;
@@ skipping 2880 matching lines @@
       worker_context_visibility_ =
           worker_context->CacheController()->ClientBecameVisible();
     } else {
       worker_context->CacheController()->ClientBecameNotVisible(
           std::move(worker_context_visibility_));
     }
   }
 }
 
 }  // namespace cc