Prevent modal dialogs when preparing to swap out.

content/browser/renderer_host/render_view_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_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 653 matching lines @@
     int64 frame_id) {
   RenderViewHostDelegate::RendererManagement* manager =
       delegate_->GetRendererManagementDelegate();
   if (manager) {
     manager->OnCrossSiteResponse(this, global_request_id, is_transfer,
                                  transfer_url_chain, referrer, page_transition,
                                  frame_id);
   }
 }
 
+void RenderViewHostImpl::SuppressDialogsUntilSwapOut() {
+  Send(new ViewMsg_SuppressDialogsUntilSwapOut(GetRoutingID()));
+}
+
 void RenderViewHostImpl::SwapOut() {
   // This will be set back to false in OnSwapOutACK, just before we replace
   // this RVH with the pending RVH.
   is_waiting_for_unload_ack_ = true;
   // Start the hang monitor in case the renderer hangs in the unload handler.
   // Increment the in-flight event count, to ensure that input events won't
   // cancel the timeout timer.
   increment_in_flight_event_count();
   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
 
@@ skipping 1581 matching lines @@
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->SwapMainFrame(main_render_frame_host_.get());
   if (main_frame_id() != FrameTreeNode::kInvalidFrameId) {
     frame_tree->OnFirstNavigationAfterSwap(main_frame_id());
   }
 }
 
 }  // namespace content