Disable input events when a JS dialog is showing.

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2009 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 "chrome/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <vector>
 
 #include "app/l10n_util.h"
@@ skipping 543 matching lines @@
   Send(new ViewMsg_GetApplicationInfo(routing_id(), page_id));
 }
 
 void RenderViewHost::CaptureThumbnail() {
   Send(new ViewMsg_CaptureThumbnail(routing_id()));
 }
 
 void RenderViewHost::JavaScriptMessageBoxClosed(IPC::Message* reply_msg,
                                                 bool success,
                                                 const std::wstring& prompt) {
+  process()->set_ignore_input_events(false);
   if (is_waiting_for_unload_ack_) {
     if (are_javascript_messages_suppressed_) {
       delegate_->RendererUnresponsive(this, is_waiting_for_unload_ack_);
       return;
     }
 
     StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kUnloadTimeoutMS));
   }
 
   ViewHostMsg_RunJavaScriptMessage::WriteReplyParams(reply_msg,
@@ skipping 685 matching lines @@
                                          const FilePath& default_file) {
   delegate_->RunFileChooser(multiple_files, title, default_file);
 }
 
 void RenderViewHost::OnMsgRunJavaScriptMessage(
     const std::wstring& message,
     const std::wstring& default_prompt,
     const GURL& frame_url,
     const int flags,
     IPC::Message* reply_msg) {
+  // While a JS message dialog is showing, tabs in the same process shouldn't
+  // process input events.
+  process()->set_ignore_input_events(true);
   StopHangMonitorTimeout();
   SignalModalDialogEvent();
   delegate_->RunJavaScriptMessage(message, default_prompt, frame_url, flags,
                                   reply_msg,
                                   &are_javascript_messages_suppressed_);
 }
 
 void RenderViewHost::OnMsgRunBeforeUnloadConfirm(const GURL& frame_url,
                                                  const std::wstring& message,
                                                  IPC::Message* reply_msg) {
+  // While a JS before unload dialog is showing, tabs in the same process
+  // shouldn't process input events.
+  process()->set_ignore_input_events(true);
   StopHangMonitorTimeout();
   SignalModalDialogEvent();
   delegate_->RunBeforeUnloadConfirm(message, reply_msg);
 }
 
 void RenderViewHost::OnMsgShowModalHTMLDialog(
     const GURL& url, int width, int height, const std::string& json_arguments,
     IPC::Message* reply_msg) {
   StopHangMonitorTimeout();
   SignalModalDialogEvent();
@@ skipping 337 matching lines @@
 
 void RenderViewHost::SignalModalDialogEvent() {
   if (modal_dialog_count_++ == 0)
     modal_dialog_event_->Signal();
 }
 
 void RenderViewHost::ResetModalDialogEvent() {
  if (--modal_dialog_count_ == 0)
    modal_dialog_event_->Reset();
 }