SelectionOwner: add support for TIMESTAMP target

components/bookmarks/browser/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/config/ui.gni")
 
 source_set("browser") {
   sources = [
     "base_bookmark_model_observer.cc",
     "base_bookmark_model_observer.h",
@@ skipping 92 matching lines @@
     "//components/bookmarks/common",
     "//components/bookmarks/test",
     "//components/favicon_base",
     "//components/pref_registry",
     "//components/prefs",
     "//components/prefs:test_support",
     "//testing/gtest",
     "//ui/base",
     "//url",
   ]
+
+  if (use_x11) {
+    deps += [
+      "//ui/events/platform/x11",
+      "//ui/gfx/x",
+    ]
+  }
 }