Disable the hang dialog detector when showModalDialog is running.

content/browser/renderer_host/render_view_host_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 420 matching lines @@
   virtual void OnMsgFocus() OVERRIDE;
   virtual void OnMsgBlur() OVERRIDE;
 
   // IPC message handlers.
   void OnMsgShowView(int route_id,
                      WindowOpenDisposition disposition,
                      const gfx::Rect& initial_pos,
                      bool user_gesture);
   void OnMsgShowWidget(int route_id, const gfx::Rect& initial_pos);
   void OnMsgShowFullscreenWidget(int route_id);
-  void OnMsgRunModal(IPC::Message* reply_msg);
+  void OnMsgRunModal(int opener_id, IPC::Message* reply_msg);
   void OnMsgRenderViewReady();
   void OnMsgRenderViewGone(int status, int error_code);
   void OnMsgDidStartProvisionalLoadForFrame(int64 frame_id,
                                             bool main_frame,
                                             const GURL& opener_url,
                                             const GURL& url);
   void OnMsgDidRedirectProvisionalLoad(int32 page_id,
                                        const GURL& opener_url,
                                        const GURL& source_url,
                                        const GURL& target_url);
@@ skipping 129 matching lines @@
   // second navigation occurs.
   scoped_ptr<ViewMsg_Navigate> suspended_nav_message_;
 
   // Whether this RenderViewHost is currently swapped out, such that the view is
   // being rendered by another process.
   bool is_swapped_out_;
 
   // If we were asked to RunModal, then this will hold the reply_msg that we
   // must return to the renderer to unblock it.
   IPC::Message* run_modal_reply_msg_;
+  // This will hold the routing id of the RenderView that opened us.
+  int run_modal_opener_id_;
 
   // Set to true when there is a pending ViewMsg_ShouldClose message.  This
   // ensures we don't spam the renderer with multiple beforeunload requests.
   // When either this value or is_waiting_for_unload_ack_ is true, the value of
   // unload_ack_is_for_cross_site_transition_ indicates whether this is for a
   // cross-site transition or a tab close attempt.
   bool is_waiting_for_beforeunload_ack_;
 
   // Set to true when there is a pending ViewMsg_Close message.  Also see
   // is_waiting_for_beforeunload_ack_, unload_ack_is_for_cross_site_transition_.
@@ skipping 40 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_