Windowed plugins like Flash would cause the hung plugin dialog to show up whe...

chrome/browser/renderer_host/render_widget_helper.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_RENDEDER_HOST_RENDER_WIDGET_HELPER_H_
 #define CHROME_BROWSER_RENDEDER_HOST_RENDER_WIDGET_HELPER_H_
 
 #include <map>
 
 #include "base/atomic_sequence_num.h"
@@ skipping 120 matching lines @@
   void CreateNewWidget(int opener_id, bool activatable, int* route_id);
 
 #if defined(OS_MACOSX)
   // Called on the IO thread to handle the allocation of a transport DIB
   void AllocTransportDIB(size_t size, TransportDIB::Handle* result);
 
   // Called on the IO thread to handle the freeing of a transport DIB
   void FreeTransportDIB(TransportDIB::Id dib_id);
 #endif
 
+  // Helper functions to signal and reset the modal dialog event, used to
+  // signal the renderer that it needs to pump messages while waiting for
+  // sync calls to return. These functions proxy the request to the UI thread.
+  void SignalModalDialogEvent(int routing_id);
+  void ResetModalDialogEvent(int routing_id);
+
  private:
   // A class used to proxy a paint message.  PaintMsgProxy objects are created
   // on the IO thread and destroyed on the UI thread.
   class PaintMsgProxy;
   friend class PaintMsgProxy;
 
   // Map from render_widget_id to live PaintMsgProxy instance.
   typedef base::hash_map<int, PaintMsgProxy*> PaintMsgProxyMap;
 
   // Called on the UI thread to discard a paint message.
@@ skipping 23 matching lines @@
 #if defined(OS_MACOSX)
   // Called on destruction to release all allocated transport DIBs
   void ClearAllocatedDIBs();
 
   // On OSX we keep file descriptors to all the allocated DIBs around until
   // the renderer frees them.
   Lock allocated_dibs_lock_;
   std::map<TransportDIB::Id, int> allocated_dibs_;
 #endif
 
+  void SignalModalDialogEventOnUI(int routing_id);
+  void ResetModalDialogEventOnUI(int routing_id);
+
   // A map of live paint messages.  Must hold pending_paints_lock_ to access.
   // The PaintMsgProxy objects are not owned by this map.  (See PaintMsgProxy
   // for details about how the lifetime of instances are managed.)
   PaintMsgProxyMap pending_paints_;
   Lock pending_paints_lock_;
 
   int render_process_id_;
   MessageLoop* ui_loop_;
 
   // Event used to implement WaitForPaintMsg.
   base::WaitableEvent event_;
 
   // The next routing id to use.
   base::AtomicSequenceNumber next_routing_id_;
 
   ResourceDispatcherHost* resource_dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHelper);
 };
 
 #endif  // CHROME_BROWSER_RENDEDER_HOST_RENDER_WIDGET_HELPER_H_