Remove default begin frame sources from the renderer

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 2342 matching lines @@
   // Since the new context may be capable of MSAA, update status here. We don't
   // need to check the return value since we are recreating all resources
   // already.
   UpdateGpuRasterizationStatus();
 
   CreateAndSetRenderer();
 
   CreateTileManagerResources();
   RecreateTreeResources();
 
-  // Initialize vsync parameters to sane values.
-  const base::TimeDelta display_refresh_interval =
-      base::TimeDelta::FromMicroseconds(
-          base::Time::kMicrosecondsPerSecond /
-          settings_.renderer_settings.refresh_rate);
-  CommitVSyncParameters(base::TimeTicks(), display_refresh_interval);
-
   // TODO(brianderson): Don't use a hard-coded parent draw time.
   base::TimeDelta parent_draw_time =
       (!settings_.use_external_begin_frame_source &&
        output_surface_->capabilities().adjust_deadline_for_parent)
           ? BeginFrameArgs::DefaultEstimatedParentDrawTime()
           : base::TimeDelta();
   client_->SetEstimatedParentDrawTime(parent_draw_time);
 
   DCHECK_EQ(1, output_surface_->capabilities().max_frames_pending);
   client_->OnCanDrawStateChanged(CanDraw());
 
   // There will not be anything to draw here, so set high res
   // to avoid checkerboards, typically when we are recovering
   // from lost context.
   // TODO(crbug.com/469175): Replace with RequiresHighResToDraw.
   SetRequiresHighResToDraw();
 
   return true;
 }
 
-void LayerTreeHostImpl::CommitVSyncParameters(base::TimeTicks timebase,
-                                              base::TimeDelta interval) {
-  client_->CommitVSyncParameters(timebase, interval);
-}
-
 void LayerTreeHostImpl::SetBeginFrameSource(BeginFrameSource* source) {
   client_->SetBeginFrameSource(source);
 }
 
 void LayerTreeHostImpl::SetViewportSize(const gfx::Size& device_viewport_size) {
   if (device_viewport_size == device_viewport_size_)
     return;
   TRACE_EVENT_INSTANT2("cc", "LayerTreeHostImpl::SetViewportSize",
                        TRACE_EVENT_SCOPE_THREAD, "width",
                        device_viewport_size.width(), "height",
@@ skipping 1799 matching lines @@
   if (is_visible) {
     worker_context_visibility_ =
         worker_context->CacheController()->ClientBecameVisible();
   } else {
     worker_context->CacheController()->ClientBecameNotVisible(
         std::move(worker_context_visibility_));
   }
 }
 
 }  // namespace cc