cc: Get rid of LayerTreeHost::output_surface_lost_ state.

cc/test/layer_tree_test.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/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 373 matching lines @@
         DCHECK(!external_begin_frame_source);
         // The Remote LayerTreeHost on the client has the impl task runner.
         if (task_runner_provider->HasImplThread()) {
           proxy = base::MakeUnique<RemoteChannelImpl>(
               layer_tree_host.get(), remote_proto_channel,
               task_runner_provider.get());
         } else {
           proxy = ProxyMain::CreateRemote(remote_proto_channel,
                                           layer_tree_host.get(),
                                           task_runner_provider.get());
-
-          // The LayerTreeHost on the server will never have an output surface.
-          // Set output_surface_lost_ to false by default.
-          layer_tree_host->SetOutputSurfaceLostForTesting(false);
         }
         break;
     }
     layer_tree_host->InitializeForTesting(
         std::move(task_runner_provider), std::move(proxy),
         std::move(external_begin_frame_source));
     return layer_tree_host;
   }
 
   std::unique_ptr<LayerTreeHostImpl> CreateLayerTreeHostImpl(
@@ skipping 536 matching lines @@
 }
 
 LayerTreeHost* LayerTreeTest::remote_client_layer_tree_host() {
   DCHECK(IsRemoteTest());
   DCHECK(task_runner_provider()->IsMainThread() ||
          task_runner_provider()->IsMainThreadBlocked());
   return remote_client_layer_tree_host_.get();
 }
 
 }  // namespace cc