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

chrome/common/render_messages_internal.h

 // 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <string>
 #include <vector>
@@ skipping 1063 matching lines @@
 
   // The renderer wants to know the default print settings.
   IPC_SYNC_MESSAGE_ROUTED0_1(ViewHostMsg_GetDefaultPrintSettings,
                              ViewMsg_Print_Params /* default_settings */)
 
 #if defined(OS_WIN)
   // It's the renderer that controls the printing process when it is generated
   // by javascript. This step is about showing UI to the user to select the
   // final print settings. The output parameter is the same as
   // ViewMsg_PrintPages which is executed implicitly.
-  IPC_SYNC_MESSAGE_ROUTED4_1(ViewHostMsg_ScriptedPrint,
-                             gfx::NativeViewId /* host_window */,
-                             int /* cookie */,
-                             int /* expected_pages_count */,
-                             bool /* has_selection */,
-                             ViewMsg_PrintPages_Params /* settings choosen by
+  IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_ScriptedPrint,
+                              ViewHostMsg_ScriptedPrint_Params,
+                              ViewMsg_PrintPages_Params /* settings choosen by
                                                           the user*/)
 #endif  // defined(OS_WIN)
 
   // WebKit and JavaScript error messages to log to the console
   // or debugger UI.
   IPC_MESSAGE_ROUTED3(ViewHostMsg_AddMessageToConsole,
                       std::wstring, /* msg */
                       int32, /* line number */
                       std::wstring /* source id */)
 
@@ skipping 368 matching lines @@
   // web resource.  |error_message| is a user-readable explanation of what
   // went wrong.
   IPC_MESSAGE_CONTROL1(UtilityHostMsg_UnpackWebResource_Failed,
                        std::string /* error_message, if any */)
 
   // Sent by the renderer process to acknowledge receipt of a
   // ViewMsg_CSSInsertRequest message and css has been inserted into the frame.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_OnCSSInserted)
 
 IPC_END_MESSAGES(ViewHost)