Add ui/display, message_center, webview to GN build.

ui/base/ui_base.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/base
       'target_name': 'ui_base',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/base.gyp:base_static',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../net/net.gyp:net',
         '../../skia/skia.gyp:skia',
         '../../third_party/icu/icu.gyp:icui18n',
         '../../third_party/icu/icu.gyp:icuuc',
         '../../url/url.gyp:url_lib',
         '../events/events.gyp:events_base',
         '../events/platform/events_platform.gyp:events_platform',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         '../resources/ui_resources.gyp:ui_resources',
         '../strings/ui_strings.gyp:ui_strings',
       ],
       'defines': [
         'UI_BASE_IMPLEMENTATION',
       ],
       'export_dependent_settings': [
         '../../net/net.gyp:net',
         '../gfx/gfx.gyp:gfx',
       ],
       'sources' : [
+        # Note: file list duplicated in GN build.
         'accelerators/accelerator.cc',
         'accelerators/accelerator.h',
         'accelerators/accelerator_manager.cc',
         'accelerators/accelerator_manager.h',
         'accelerators/menu_label_accelerator_util_linux.cc',
         'accelerators/menu_label_accelerator_util_linux.h',
         'accelerators/platform_accelerator.h',
         'accelerators/platform_accelerator_cocoa.h',
         'accelerators/platform_accelerator_cocoa.mm',
         'android/ui_base_jni_registrar.cc',
@@ skipping 525 matching lines @@
         }],
         ['use_system_icu==1', {
           # When using the system icu, the icu targets generate shim headers
           # which are included by public headers in the ui target, so we need
           # ui to be a hard dependency for all its users.
           'hard_dependency': 1,
         }],
       ],
     },
     {
+      # GN version: //ui/base:test_support
       'target_name': 'ui_base_test_support',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'test/ui_controls.h',
         'test/ui_controls_aura.cc',
         'test/ui_controls_internal_win.cc',
         'test/ui_controls_internal_win.h',
         'test/ui_controls_mac.mm',
         'test/ui_controls_win.cc',
       ],
       'include_dirs': [
         '../..',
       ],
@@ skipping 15 matching lines @@
             'test/ui_controls_win.cc',
           ],
         }],
       ],
     },
   ],
   'conditions': [
     ['OS=="android"' , {
        'targets': [
          {
+           # GN version: //ui/base:ui_base_jni_headers
            'target_name': 'ui_base_jni_headers',
            'type': 'none',
            'sources': [
+             # Note: file list duplicated in GN build.
              '../android/java/src/org/chromium/ui/base/Clipboard.java',
              '../android/java/src/org/chromium/ui/base/DeviceFormFactor.java',
              '../android/java/src/org/chromium/ui/base/LocalizationUtils.java',
              '../android/java/src/org/chromium/ui/base/SelectFileDialog.java',
              '../android/java/src/org/chromium/ui/base/TouchDevice.java',
              '../android/java/src/org/chromium/ui/base/ViewAndroid.java',
              '../android/java/src/org/chromium/ui/base/WindowAndroid.java',
            ],
            'variables': {
              'jni_gen_package': 'ui',
            },
            'includes': [ '../../build/jni_generator.gypi' ],
          },
        ],
     }],
   ],
 }