Move indexeddb code to its own directory inside of content/{browser,common,renderer}

content/common/indexed_db_key.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 CONTENT_COMMON_INDEXED_DB_KEY_H_
-#define CONTENT_COMMON_INDEXED_DB_KEY_H_
-#pragma once
-
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/string16.h"
-#include "content/common/content_export.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBKey.h"
-
-class CONTENT_EXPORT IndexedDBKey {
- public:
-  IndexedDBKey(); // Defaults to WebKit::WebIDBKey::InvalidType.
-  explicit IndexedDBKey(const WebKit::WebIDBKey& key);
-  ~IndexedDBKey();
-
-  void SetInvalid();
-  void SetArray(const std::vector<IndexedDBKey>& array);
-  void SetString(const string16& string);
-  void SetDate(double date);
-  void SetNumber(double number);
-  void Set(const WebKit::WebIDBKey& key);
-
-  WebKit::WebIDBKey::Type type() const { return type_; }
-  const std::vector<IndexedDBKey>& array() const { return array_; }
-  const string16& string() const { return string_; }
-  double date() const { return date_; }
-  double number() const { return number_; }
-
-  operator WebKit::WebIDBKey() const;
-
- private:
-  WebKit::WebIDBKey::Type type_;
-  std::vector<IndexedDBKey> array_;
-  string16 string_;
-  double date_;
-  double number_;
-};
-
-#endif  // CONTENT_COMMON_INDEXED_DB_KEY_H_