Move |ScopedWebInputEvent| and |WebInputEventTraits| from |content::| to "ui/events/blink"

ui/events/events_unittests.gyp

 # Copyright 2015 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': [
     {
@@ skipping 106 matching lines @@
           ],
           'dependencies': [
             '../../testing/android/native_test.gyp:native_test_native_code',
           ],
         }],
         ['OS!="ios"', {
           'sources': [
             'blink/blink_event_util_unittest.cc',
             'blink/input_handler_proxy_unittest.cc',
             'blink/input_scroll_elasticity_controller_unittest.cc',
+            'blink/web_input_event_traits_unittest.cc',
           ],
           'dependencies': [
             'blink/events_blink.gyp:events_blink',
           ],
         }],
       ],
     },
   ],
   'conditions': [
     ['OS == "android"', {
@@ skipping 49 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }