Fix races in tests waiting for beforeunload dialogs.

content/browser/frame_host/render_frame_host_impl.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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1896 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   NotifyForEachFrameFromUI(
       this,
       base::Bind(&ResourceDispatcherHostImpl::CancelBlockedRequestsForRoute));
 }
 
 void RenderFrameHostImpl::DisableBeforeUnloadHangMonitorForTesting() {
   beforeunload_timeout_.reset();
 }
 
+bool RenderFrameHostImpl::IsBeforeUnloadHangMonitorDisabledForTesting() {
+  return !beforeunload_timeout_;
+}
+
 void RenderFrameHostImpl::OnDidAccessInitialDocument() {
   delegate_->DidAccessInitialDocument();
 }
 
 void RenderFrameHostImpl::OnDidChangeOpener(int32_t opener_routing_id) {
   frame_tree_node_->render_manager()->DidChangeOpener(opener_routing_id,
                                                       GetSiteInstance());
 }
 
 void RenderFrameHostImpl::OnDidChangeName(const std::string& name,
@@ skipping 1751 matching lines @@
     service_manager::mojom::InterfaceProviderPtr provider;
     BindInterfaceRegistryForRenderFrameHost(mojo::MakeRequest(&provider), this);
     java_interfaces_.reset(new service_manager::InterfaceProvider);
     java_interfaces_->Bind(std::move(provider));
   }
   return java_interfaces_.get();
 }
 #endif
 
 }  // namespace content