Revert of Make SingleThreadProxy a SchedulerClient

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 <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 679 matching lines @@
 
   SetNeedsCommit();
 }
 
 void LayerTreeHost::NotifyInputThrottledUntilCommit() {
   proxy_->NotifyInputThrottledUntilCommit();
 }
 
 void LayerTreeHost::Composite(base::TimeTicks frame_begin_time) {
   DCHECK(!proxy_->HasImplThread());
-  // This function is only valid when not using the scheduler.
-  DCHECK(!settings_.single_thread_proxy_scheduler);
   SingleThreadProxy* proxy = static_cast<SingleThreadProxy*>(proxy_.get());
 
-  SetLayerTreeHostClientReady();
-
   if (output_surface_lost_)
     proxy->CreateAndInitializeOutputSurface();
   if (output_surface_lost_)
     return;
 
   proxy->CompositeImmediately(frame_begin_time);
 }
 
 bool LayerTreeHost::UpdateLayers(ResourceUpdateQueue* queue) {
   DCHECK(!output_surface_lost_);
@@ skipping 573 matching lines @@
   swap_promise_list_.push_back(swap_promise.Pass());
 }
 
 void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) {
   for (size_t i = 0; i < swap_promise_list_.size(); i++)
     swap_promise_list_[i]->DidNotSwap(reason);
   swap_promise_list_.clear();
 }
 
 }  // namespace cc