ozone: Add ozone_unittests target

ui/ozone/ozone_unittests.gypi

Index: ui/ozone/ozone_unittests.gypi
diff --git a/ui/ozone/ozone_unittests.gypi b/ui/ozone/ozone_unittests.gypi
deleted file mode 100644
index b57f47efe59f93a167171e6bdf2041f7881810c4..0000000000000000000000000000000000000000
--- a/ui/ozone/ozone_unittests.gypi
+++ /dev/null
@@ -1,30 +0,0 @@
-# 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.
-
-{
-  'sources': [
-    'platform/dri/dri_surface_factory_unittest.cc',
-    'platform/dri/dri_surface_unittest.cc',
-    'platform/dri/hardware_display_controller_unittest.cc',
-    'platform/dri/screen_manager_unittest.cc',
-    'platform/dri/test/mock_dri_surface.cc',
-    'platform/dri/test/mock_dri_surface.h',
-    'platform/dri/test/mock_dri_wrapper.cc',
-    'platform/dri/test/mock_dri_wrapper.h',
-    'platform/dri/test/mock_surface_generator.cc',
-    'platform/dri/test/mock_surface_generator.h',
-  ],
-  'conditions': [
-    ['ozone_platform_dri == 1', {
-      'dependencies': [
-        '../build/linux/system.gyp:dridrm',
-        '../ui/ozone/ozone.gyp:ozone',
-      ],
-    }, {
-      'sources/': [
-        ['exclude', '^platform/dri/'],
-      ],
-    }],
-  ],
-}