Use builders to convert between WebKit and content IDB types

content/common/indexed_db/indexed_db_key_path.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 CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_PATH_H_
 #define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_PATH_H_
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
-#include "third_party/WebKit/public/platform/WebIDBKeyPath.h"
+#include "third_party/WebKit/public/platform/WebIDBTypes.h"
 
 namespace content {
 
 class CONTENT_EXPORT IndexedDBKeyPath {
  public:
   IndexedDBKeyPath();  // Defaults to WebKit::WebIDBKeyPathTypeNull.
   explicit IndexedDBKeyPath(const string16&);
   explicit IndexedDBKeyPath(const std::vector<string16>&);
-  explicit IndexedDBKeyPath(const WebKit::WebIDBKeyPath&);
   ~IndexedDBKeyPath();
 
   bool IsNull() const { return type_ == WebKit::WebIDBKeyPathTypeNull; }
-  bool IsValid() const;
   bool operator==(const IndexedDBKeyPath& other) const;
 
   WebKit::WebIDBKeyPathType type() const { return type_; }
   const std::vector<string16>& array() const;
   const string16& string() const;
-  operator WebKit::WebIDBKeyPath() const;
 
  private:
   WebKit::WebIDBKeyPathType type_;
   string16 string_;
   std::vector<string16> array_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_PATH_H_