events: Make it a separate component from ui.

ui/v2/v2.gyp

 # Copyright (c) 2013 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': [
     {
       'target_name': 'v2',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../cc/cc.gyp:cc',
         '../../gpu/gpu.gyp:gpu',
         '../../skia/skia.gyp:skia',
         '../compositor/compositor.gyp:compositor',
+        '../events/events.gyp:events',
         '../gfx/gfx.gyp:gfx',
         '../ui.gyp:ui',
         '../ui.gyp:ui_resources',
       ],
       'defines': [
         'V2_IMPLEMENTATION',
       ],
       'sources': [
         'public/event.h',
         'public/event_dispatcher.h',
@@ skipping 23 matching lines @@
         '../../testing/gtest.gyp:gtest',
         'v2',
       ],
       'sources': [
         'src/v2_unittests.cc',
         'src/view_unittest.cc',
       ],
     },
   ],
 }