Move the Pepper implementation from webkit/glue/plugins/pepper_* to...

webkit/glue/plugins/pepper_string.h

-// Copyright (c) 2010 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_PLUGINS_PEPPER_STRING_H_
-#define WEBKIT_GLUE_PLUGINS_PEPPER_STRING_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/ref_counted.h"
-
-namespace pepper {
-
-class String : public base::RefCountedThreadSafe<String> {
- public:
-  String(const char* str, uint32 len);
-  virtual ~String();
-
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-
-  DISALLOW_COPY_AND_ASSIGN(String);
-};
-
-}  // namespace pepper
-
-#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_STRING_H_