Remove external begin frame source parameter and settings

cc/layers/layer_perftest.cc

 // Copyright 2013 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/layers/layer.h"
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "cc/debug/lap_timer.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host.h"
@@ skipping 19 matching lines @@
                    &task_graph_runner_),
         timer_(kWarmupRuns,
                base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
                kTimeCheckInterval) {}
 
  protected:
   void SetUp() override {
     layer_tree_host_ =
         FakeLayerTreeHost::Create(&fake_client_, &task_graph_runner_);
     layer_tree_host_->InitializeSingleThreaded(
-        &single_thread_client_, base::ThreadTaskRunnerHandle::Get(), nullptr);
+        &single_thread_client_, base::ThreadTaskRunnerHandle::Get());
   }
 
   void TearDown() override {
     layer_tree_host_->SetRootLayer(nullptr);
     layer_tree_host_ = nullptr;
   }
 
   FakeImplTaskRunnerProvider task_runner_provider_;
   TestSharedBitmapManager shared_bitmap_manager_;
   TestTaskGraphRunner task_graph_runner_;
@@ skipping 107 matching lines @@
     test_layer->PushPropertiesTo(impl_layer.get());
     timer_.NextLap();
   } while (!timer_.HasTimeLimitExpired());
 
   perf_test::PrintResult("impl_push_properties_to", "", "props_didnt_change",
                          timer_.LapsPerSecond(), "runs/s", true);
 }
 
 }  // namespace
 }  // namespace cc