Relanding this as the previous attempt failed due to build errors.

webkit/plugins/ppapi/ppb_file_ref_impl.h

 // 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.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_PPB_FILE_REF_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_FILE_REF_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/memory/linked_ptr.h"
 #include "googleurl/src/gurl.h"
 #include "ppapi/c/pp_file_info.h"
 #include "ppapi/c/ppb_file_ref.h"
 #include "ppapi/shared_impl/ppb_file_ref_shared.h"
 #include "ppapi/shared_impl/scoped_pp_resource.h"
 #include "ppapi/shared_impl/var.h"
-#include "webkit/glue/webkit_glue_export.h"
 #include "webkit/plugins/ppapi/file_callbacks.h"
+#include "webkit/plugins/webkit_plugins_export.h"
 
 namespace webkit {
 namespace ppapi {
 
 using ::ppapi::StringVar;
 
 class PPB_FileSystem_Impl;
 
-class WEBKIT_GLUE_EXPORT PPB_FileRef_Impl
+class WEBKIT_PLUGINS_EXPORT PPB_FileRef_Impl
     : public ::ppapi::PPB_FileRef_Shared {
  public:
   PPB_FileRef_Impl(const ::ppapi::PPB_FileRef_CreateInfo& info,
                    PP_Resource file_system);
   PPB_FileRef_Impl(const ::ppapi::PPB_FileRef_CreateInfo& info,
                    const base::FilePath& external_file_path);
   virtual ~PPB_FileRef_Impl();
 
   // The returned object will have a refcount of 0 (just like "new").
   static PPB_FileRef_Impl* CreateInternal(PP_Instance instance,
@@ skipping 79 matching lines @@
   // return the identical string object every time it is requested.
   scoped_refptr<StringVar> external_path_var_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_FILE_REF_IMPL_H_