Fixing a random hang when exiting full screen in chome. The same bug doesn't

plugin/win/main_win.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 651 matching lines @@
   }
 
   obj->SetHWnd(NULL);
 }
 
 // Re-parents the content_hwnd into the containing_hwnd, resizing the
 // content_hwnd to the given width and height in the process.
 void ReplaceContentWindow(HWND content_hwnd,
                           HWND containing_hwnd,
                           int width, int height) {
-  ::ShowWindow(content_hwnd, SW_HIDE);
+  // In Chrome browser, IPC might block this call.  This doesn't happen with
+  // firefox or internet explorer.  For Chome, do not hide the window.  Haven't
+  // any artifacts with this change when exiting from full screen.
+  PluginObject *obj = PluginObject::GetPluginProperty(content_hwnd);
+  if (obj && !obj->IsChrome()) {
+    ::ShowWindow(content_hwnd, SW_HIDE);
+  }
   LONG_PTR style = ::GetWindowLongPtr(content_hwnd, GWL_STYLE);
   style |= WS_CHILD;
   ::SetWindowLongPtr(content_hwnd, GWL_STYLE, style);
   LONG_PTR exstyle = ::GetWindowLongPtr(content_hwnd, GWL_EXSTYLE);
   exstyle &= ~WS_EX_TOOLWINDOW;
   ::SetWindowLongPtr(content_hwnd, GWL_EXSTYLE, exstyle);
   ::SetParent(content_hwnd, containing_hwnd);
   BOOL res = ::SetWindowPos(content_hwnd, containing_hwnd,
                             0, 0, width, height,
                             SWP_NOZORDER | SWP_ASYNCWINDOWPOS);
@@ skipping 258 matching lines @@
     if (!renderer_->CancelFullscreen(display, prev_width_, prev_height_)) {
       LOG(FATAL) << "Failed to get the renderer out of fullscreen mode!";
     }
     ReplaceContentWindow(GetContentHWnd(), GetPluginHWnd(),
                          prev_width_, prev_height_);
     client()->SendResizeEvent(prev_width_, prev_height_, false);
   }
 }
 }  // namespace _o3d
 }  // namespace glue