Add gesture support in views::ResizeArea

ui/views/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 import("//ui/ozone/ozone.gni")
 import("//ui/vector_icons/vector_icons.gni")
@@ skipping 858 matching lines @@
     "controls/menu/menu_item_view_unittest.cc",
     "controls/menu/menu_model_adapter_unittest.cc",
     "controls/menu/menu_runner_cocoa_unittest.mm",
     "controls/menu/menu_runner_unittest.cc",
     "controls/native/native_view_host_mac_unittest.mm",
     "controls/native/native_view_host_test_base.cc",
     "controls/native/native_view_host_test_base.h",
     "controls/native/native_view_host_unittest.cc",
     "controls/prefix_selector_unittest.cc",
     "controls/progress_bar_unittest.cc",
+    "controls/resize_area_unittest.cc",
     "controls/scroll_view_unittest.cc",
     "controls/scrollbar/scrollbar_unittest.cc",
     "controls/slider_unittest.cc",
     "controls/styled_label_unittest.cc",
     "controls/tabbed_pane/tabbed_pane_accessibility_mac_unittest.mm",
     "controls/tabbed_pane/tabbed_pane_unittest.cc",
     "controls/table/table_utils_unittest.cc",
     "controls/table/table_view_unittest.cc",
     "controls/table/test_table_model.cc",
     "controls/table/test_table_model.h",
@@ skipping 176 matching lines @@
       "//ui/base:test_support",
       "//ui/compositor",
       "//ui/events:test_support",
       "//ui/gl:test_support",
       "//ui/resources",
       "//ui/resources:ui_test_pak",
       "//ui/strings",
     ]
   }
 }