Fix DevToolsBeforeUnloadTest and BrowserCloseManagerBrowserTest.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 
 #include <set>
 #include <tuple>
@@ skipping 965 matching lines @@
   hang_monitor_timeout_->Start(delay);
 }
 
 void RenderWidgetHostImpl::RestartHangMonitorTimeoutIfNecessary() {
   if (!hang_monitor_timeout_)
     return;
   if (in_flight_event_count_ > 0 && !is_hidden_)
     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 }
 
-void RenderWidgetHostImpl::DisableHangMonitorForTesting() {
-  StopHangMonitorTimeout();
-  hang_monitor_timeout_.reset();
-}
-
 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
   if (hang_monitor_timeout_)
     hang_monitor_timeout_->Stop();
   RendererIsResponsive();
 }
 
 void RenderWidgetHostImpl::StartNewContentRenderingTimeout(
     uint32_t next_source_id) {
   current_content_source_id_ = next_source_id;
   // It is possible for a compositor frame to arrive before the browser is
@@ skipping 1649 matching lines @@
 void RenderWidgetHostImpl::RequestCompositionUpdates(bool immediate_request,
                                                      bool monitor_updates) {
   if (!immediate_request && monitor_updates == monitoring_composition_info_)
     return;
   monitoring_composition_info_ = monitor_updates;
   Send(new InputMsg_RequestCompositionUpdates(routing_id_, immediate_request,
                                               monitor_updates));
 }
 
 }  // namespace content