RenderWidgetHostViewWin::ReparentWindow should call RemovePropW if...

RenderWidgetHostViewWin::ReparentWindow should call RemovePropW if kNativeWindowClassFilterProp is set.

BUG=94402
TEST=None.
Review URL: http://codereview.chromium.org/7757004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98510 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_widget_host_view_win.cc

@@ -472,7 +472,7 @@ HWND RenderWidgetHostViewWin::ReparentWindow(HWND window) {
     // chrome_content_client.cc ChromeContentClient::SandboxPlugin
     g_ChangeWindowMessageFilterEx(parent, WM_MOUSEWHEEL, MSGFLT_ALLOW, NULL);
     g_ChangeWindowMessageFilterEx(parent, WM_GESTURE, MSGFLT_ALLOW, NULL);
-    ::SetPropW(orig_parent, webkit::npapi::kNativeWindowClassFilterProp, NULL);
+    ::RemovePropW(orig_parent, webkit::npapi::kNativeWindowClassFilterProp);
   }
   ::SetParent(window, parent);
   BrowserThread::PostTask(