Refactor Clipboard Last Modified Time Storage

ui/base/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
@@ skipping 367 matching lines @@
     ":ui_features",
     "//base",
     "//skia",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
   deps = [
     "//base:base_static",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
+    "//components/prefs",
     "//net",
     "//third_party/icu",
     "//third_party/zlib:zlib",
     "//ui/display",
     "//ui/events",
     "//ui/events/devices",
     "//ui/resources",
     "//ui/strings",
     "//url",
   ]
@@ skipping 597 matching lines @@
 if (is_mac) {
   mac_framework_bundle("ui_unittests_framework") {
     testonly = true
     deps = [
       "//ui/resources:ui_test_pak_bundle_data",
     ]
     info_plist = "test/framework-Info.plist"
     output_name = "ui_unittests Framework"
   }
 }