Convert string16 to base::string16 in content.

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/WebIDBTypes.h"
 
 namespace content {
 
 class CONTENT_EXPORT IndexedDBKeyPath {
  public:
   IndexedDBKeyPath();  // Defaults to blink::WebIDBKeyPathTypeNull.
-  explicit IndexedDBKeyPath(const string16&);
-  explicit IndexedDBKeyPath(const std::vector<string16>&);
+  explicit IndexedDBKeyPath(const base::string16&);
+  explicit IndexedDBKeyPath(const std::vector<base::string16>&);
   ~IndexedDBKeyPath();
 
   bool IsNull() const { return type_ == blink::WebIDBKeyPathTypeNull; }
   bool operator==(const IndexedDBKeyPath& other) const;
 
   blink::WebIDBKeyPathType type() const { return type_; }
-  const std::vector<string16>& array() const;
-  const string16& string() const;
+  const std::vector<base::string16>& array() const;
+  const base::string16& string() const;
 
  private:
   blink::WebIDBKeyPathType type_;
-  string16 string_;
-  std::vector<string16> array_;
+  base::string16 string_;
+  std::vector<base::string16> array_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_KEY_PATH_H_