Reland r113261 rebased after revert of r113249.

webkit/glue/web_io_operators.h

 // Copyright (c) 2011 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.
 
 #ifndef WEBKIT_GLUE_WEB_IO_OPERATORS_H_
 #define WEBKIT_GLUE_WEB_IO_OPERATORS_H_
 
 #include <iosfwd>
 
 #include "build/build_config.h"
 #include "webkit/glue/webkit_glue_export.h"
 
 namespace WebKit {
 
 #if defined(WCHAR_T_IS_UTF32)
 class WebString;
-std::ostream& operator<<(std::ostream& out, const WebString& s);
+WEBKIT_GLUE_EXPORT std::ostream& operator<<(std::ostream& out,
+                                            const WebString& s);
 #endif  // defined(WCHAR_T_IS_UTF32)
 
 struct WebPoint;
 WEBKIT_GLUE_EXPORT std::ostream& operator<<(std::ostream& out,
                                             const WebPoint& p);
 
 struct WebRect;
 std::ostream& operator<<(std::ostream& out, const WebRect& p);
 
 }  // namespace WebKit
 
 #endif  // WEBKIT_GLUE_WEB_IO_OPERATORS_H_