Add scroll and gesture message filters for UIPI Flash.

webkit/plugins/npapi/plugin_constants_win.h

Index: webkit/plugins/npapi/plugin_constants_win.h
===================================================================
--- webkit/plugins/npapi/plugin_constants_win.h	(revision 96778)
+++ webkit/plugins/npapi/plugin_constants_win.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -13,6 +13,9 @@
 // The window class name for a plugin window.
 extern const char16 kNativeWindowClassName[];
 
+// If property is non-zero window reparenting must add UIPI message filters.
+extern const char16 kNativeWindowClassFilterProp[];
+
 // The name of the window class name for the wrapper HWND around the actual
 // plugin window that's used when running in multi-process mode.  This window
 // is created on the browser UI thread.