Chrome side of using WebPluginListBuilder....

webkit/glue/simple_webmimeregistry_impl.cc

 // Copyright (c) 2009 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/glue/simple_webmimeregistry_impl.h"
 
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "net/base/mime_util.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebString.h"
 #include "webkit/glue/glue_util.h"
+#include "webkit/glue/webkit_glue.h"
 
 using WebKit::WebString;
 
 namespace webkit_glue {
 
 bool SimpleWebMimeRegistryImpl::supportsImageMIMEType(
     const WebString& mime_type) {
   return net::IsSupportedImageMimeType(UTF16ToASCII(mime_type).c_str());
 }
 
@@ skipping 25 matching lines @@
 
 WebString SimpleWebMimeRegistryImpl::preferredExtensionForMIMEType(
     const WebString& mime_type) {
   FilePath::StringType file_extension;
   net::GetPreferredExtensionForMimeType(UTF16ToASCII(mime_type),
                                         &file_extension);
   return FilePathStringToWebString(file_extension);
 }
 
 }  // namespace webkit_glue