Fix "all" building bots after https://codereview.chromium.org/1711843002

build/gn_migration.gypi

 # Copyright (c) 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.
 
 # This file defines five targets that we are using to track the progress of the
 # GYP->GN migration:
 #
 # 'both_gn_and_gyp' lists what GN is currently capable of building and should
 # match the 'both_gn_and_gyp' target in //BUILD.gn.
 #
@@ skipping 569 matching lines @@
             '../third_party/WebKit/Source/platform/blink_platform_tests.gyp:blink_platform_unittests_run',
             '../third_party/WebKit/Source/web/web_tests.gyp:webkit_unit_tests_run',
             '../third_party/WebKit/Source/wtf/wtf_tests.gyp:wtf_unittests_run',
             '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_unittests_run',
             '../tools/battor_agent/battor_agent.gyp:battor_agent_unittests_run',
             '../tools/gn/gn.gyp:gn_unittests_run',
             '../ui/accessibility/accessibility.gyp:accessibility_unittests_run',
             '../ui/app_list/app_list.gyp:app_list_unittests_run',
             '../ui/compositor/compositor.gyp:compositor_unittests_run',
             '../ui/events/events_unittests.gyp:events_unittests_run',
+            '../ui/gfx/gfx_tests.gyp:gfx_unittests_run',
             '../ui/message_center/message_center.gyp:message_center_unittests_run',
             '../url/url.gyp:url_unittests_run',
           ],
           'conditions': [
             ['OS=="linux"', {
               'dependencies': [
                 '../sandbox/sandbox.gyp:sandbox_linux_unittests_run',
                 '../ui/display/display.gyp:display_unittests_run',
               ],
             }],
@@ skipping 180 matching lines @@
         }],
         ['OS=="android" and target_arch != "x64"', {
           'dependencies': [
             '../third_party/android_platform/relocation_packer.gyp:android_relocation_packer_unittests#host'
           ],
         }],
       ],
     },
   ]
 }