Relanding the following revisions....

webkit/activex_shim/activex_shared.cc

 // Copyright (c) 2006-2008 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.
 
 #include "webkit/activex_shim/activex_shared.h"
 
 #include <windows.h>
 #include "base/command_line.h"
 #include "base/file_version_info.h"
 #include "base/string_util.h"
@@ skipping 207 matching lines @@
     return false;
   else
     return file_version_ls >= requested_version_ls;
 }
 
 bool IsMimeTypeActiveX(const std::string& mimetype) {
   return LowerCaseEqualsASCII(mimetype, "application/x-oleobject") ||
          LowerCaseEqualsASCII(mimetype, "application/oleobject");
 }
 
+bool GetMimeTypeForClsid(const std::string& clsid, std::string* mime_type) {
+  DCHECK(mime_type != NULL);
+
+  if (!base::strcasecmp(clsid.c_str(),
+                        "6BF52A52-394A-11D3-B153-00C04F79FAA6") ||
+      !base::strcasecmp(clsid.c_str(),
+                        "22D6F312-B0F6-11D0-94AB-0080C74C7E95")) {
+    *mime_type = "application/x-mplayer2";
+    return true;
+  }
+  return false;
+}
+
 }  // namespace activex_shim