Revert 96592 - Add scroll and gesture message filters for UIPI Flash.

chrome/browser/renderer_host/render_widget_host_view_win.cc

Index: chrome/browser/renderer_host/render_widget_host_view_win.cc
===================================================================
--- chrome/browser/renderer_host/render_widget_host_view_win.cc	(revision 96660)
+++ chrome/browser/renderer_host/render_widget_host_view_win.cc	(working copy)
@@ -446,33 +446,12 @@
   }
   DCHECK(window_class);
 
-  HWND orig_parent = ::GetParent(window);
   HWND parent = CreateWindowEx(
       WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
       MAKEINTATOM(window_class), 0,
       WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
-      0, 0, 0, 0, orig_parent, 0, GetModuleHandle(NULL), 0);
+      0, 0, 0, 0, ::GetParent(window), 0, GetModuleHandle(NULL), 0);
   ui::CheckWindowCreated(parent);
-  // If UIPI is enabled we need to add message filters for parents with
-  // children that cross process boundaries.
-  if (::GetPropW(orig_parent, webkit::npapi::kNativeWindowClassFilterProp)) {
-    // Process-wide message filters required on Vista must be added to:
-    // chrome_content_client.cc ChromeContentClient::SandboxPlugin
-    typedef BOOL (WINAPI *ChangeWindowMessageFilterExFunction)(
-        HWND hwnd,
-        UINT message,
-        DWORD action,
-        PCHANGEFILTERSTRUCT change_filter_struct);
-    static ChangeWindowMessageFilterExFunction s_ChangeWindowMessageFilterEx =
-        reinterpret_cast<ChangeWindowMessageFilterExFunction>(
-            ::GetProcAddress(::GetModuleHandle(L"user32.dll"),
-                             "ChangeWindowMessageFilterEx"));
-    // Process-wide message filters required on Vista must be added to:
-    // chrome_content_client.cc ChromeContentClient::SandboxPlugin
-    s_ChangeWindowMessageFilterEx(parent, WM_MOUSEWHEEL, MSGFLT_ALLOW, NULL);
-    s_ChangeWindowMessageFilterEx(parent, WM_GESTURE, MSGFLT_ALLOW, NULL);
-    ::SetPropW(orig_parent, webkit::npapi::kNativeWindowClassFilterProp, NULL);
-  }
   ::SetParent(window, parent);
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,