Enable more tests in GN build.

ui/views/controls/webview/webview_tests.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
+      # GN version: //ui/views/controls/webview:test_support
       'target_name': 'webview_test_support',
       'type': 'static_library',
       'dependencies': [
         '../../../../base/base.gyp:base',
         '../../../../content/content.gyp:content',
         '../../../../content/content_shell_and_tests.gyp:test_support_content',
         '../../../../ipc/ipc.gyp:test_support_ipc',
         '../../../../skia/skia.gyp:skia',
         '../../../../testing/gtest.gyp:gtest',
         '../../../aura/aura.gyp:aura',
         '../../../base/ui_base.gyp:ui_base',
         '../../../events/events.gyp:events',
         '../../../gfx/gfx.gyp:gfx',
         '../../../gfx/gfx.gyp:gfx_geometry',
         '../../views.gyp:views',
         '../../views.gyp:views_test_support',
         'webview.gyp:webview',
       ],
       'include_dirs': [
         '../../../..',
       ],
       'sources': [
         '../../test/webview_test_helper.cc',
         '../../test/webview_test_helper.h',
       ],
     },
   ],
 }