MD WebUI: Remove WebUI test focus hack by moving to interactive ui tests

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 911 matching lines @@
         "//components/arc:arc_test_support",
         "//components/user_manager:test_support",
       ]
     }
   }
 
   js2gtest("interactive_ui_tests_js_webui") {
     test_type = "webui"
 
     sources = [
+      "data/webui/cr_elements/cr_elements_focus_test.js",
       "data/webui/md_history/md_history_focus_test.js",
     ]
 
+    gen_include_files = [
+      "data/webui/polymer_browser_test_base.js",
+      "data/webui/polymer_interactive_ui_test.js",
+    ]
+
     deps = [
       "//chrome/browser/ui",
     ]
 
     defines = [ "HAS_OUT_OF_PROC_TEST_RUNNER" ]
   }
 
   js2gtest("browser_tests_js_webui") {
     test_type = "webui"
 
@@ skipping 4165 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }