gn/linux: Add last missing tests to components_unittests.

components/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
@@ skipping 266 matching lines @@
   }
 
   if (enable_configuration_policy) {
     deps += [
       "//components/policy/core/browser:unit_tests",
       "//components/policy/core/common:unit_tests",
     ]
   }
 
   if (toolkit_views) {
-    # TODO bug 522654 Enable this when the undefined symbol is fixed in
-    # web_modal such that this links.
-    #deps += [ "//components/constrained_window:unit_tests" ]
+    deps += [ "//components/constrained_window:unit_tests" ]
   }
 
   if (is_win) {
     deps += [ "//components/browser_watcher:unit_tests" ]
   }
 
   if (enable_basic_printing || enable_print_preview) {
     deps += [
       "//components/printing/browser",
       "//components/printing/common",
@@ skipping 183 matching lines @@
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
       "//testing/gtest",
       "//testing/perf",
       "//url",
     ]
   }
 }