Split webkit_storage target into webkit_storage_{browser,common,renderer}

webkit/base/webkit_base.gypi

-# 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'webkit_base',
-      'type': '<(component)',
-      'variables': { 'enable_wexit_time_destructors': 1, },
-      'dependencies': [
-        '<(DEPTH)/base/base.gyp:base',
-        '<(DEPTH)/net/net.gyp:net',
-        '<(DEPTH)/third_party/WebKit/public/blink.gyp:blink',
-        '<(DEPTH)/url/url.gyp:url_lib',
-      ],
-      'defines': ['WEBKIT_BASE_IMPLEMENTATION'],
-      'sources': [
-        'data_element.cc',
-        'data_element.h',
-        'file_path_string_conversions.cc',
-        'file_path_string_conversions.h',
-        'origin_url_conversions.cc',
-        'origin_url_conversions.h',
-        'webkit_base_export.h',
-      ],
-    },
-  ],
-}