Clean up ifdef around FilePath creation(webkit)

webkit/plugins/npapi/plugin_stream.cc

 // Copyright (c) 2012 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.
 
 // TODO : Support NP_ASFILEONLY mode
 // TODO : Support NP_SEEK mode
 // TODO : Support SEEKABLE=true in NewStream
 
 #include "webkit/plugins/npapi/plugin_stream.h"
 
@@ skipping 65 matching lines @@
     }
   }
 
   const char* char_mime_type = "application/x-unknown-content-type";
   std::string temp_mime_type;
   if (!mime_type.empty()) {
     char_mime_type = mime_type.c_str();
   } else {
     GURL gurl(stream_.url);
 
-#if defined(OS_WIN)
-    base::FilePath path(UTF8ToWide(gurl.path()));
-#elif defined(OS_POSIX)
-    base::FilePath path(gurl.path());
-#endif
+    base::FilePath path = base::FilePath::FromUTF8Unsafe(gurl.path());
     if (net::GetMimeTypeFromFile(path, &temp_mime_type))
       char_mime_type = temp_mime_type.c_str();
   }
 
   // Silverlight expects a valid mime type
   DCHECK_NE(0U, strlen(char_mime_type));
   NPError err = instance_->NPP_NewStream((NPMIMEType)char_mime_type,
                                          &stream_, seekable_stream,
                                          &requested_plugin_mode_);
   if (err != NPERR_NO_ERROR) {
@@ skipping 183 matching lines @@
   }
 }
 
 bool PluginStream::RequestedPluginModeIsAsFile() const {
   return (requested_plugin_mode_ == NP_ASFILE ||
           requested_plugin_mode_ == NP_ASFILEONLY);
 }
 
 }  // namespace npapi
 }  // namespace webkit