Added comprehensive tests for views::Border.

ui/views/views.gyp

 # Copyright (c) 2012 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,
     # Sources lists shared with GN build.
     'views_sources': [
       'accessibility/native_view_accessibility.cc',
       'accessibility/native_view_accessibility.h',
@@ skipping 561 matching lines @@
       'accessibility/native_view_accessibility_unittest.cc',
       'accessibility/native_view_accessibility_win_unittest.cc',
       'accessible_pane_view_unittest.cc',
       'animation/bounds_animator_unittest.cc',
       'animation/flood_fill_ink_drop_ripple_unittest.cc',
       'animation/ink_drop_factory_unittest.cc',
       'animation/ink_drop_highlight_unittest.cc',
       'animation/ink_drop_impl_unittest.cc',
       'animation/ink_drop_ripple_unittest.cc',
       'animation/square_ink_drop_ripple_unittest.cc',
+      'border_unittest.cc',
       'bubble/bubble_border_unittest.cc',
       'bubble/bubble_dialog_delegate_unittest.cc',
       'bubble/bubble_frame_view_unittest.cc',
       'bubble/bubble_window_targeter_unittest.cc',
       'cocoa/bridged_native_widget_unittest.mm',
       'cocoa/cocoa_mouse_capture_unittest.mm',
       'cocoa/drag_drop_client_mac_unittest.mm',
       'controls/button/blue_button_unittest.cc',
       'controls/button/custom_button_unittest.cc',
       'controls/button/image_button_unittest.cc',
@@ skipping 451 matching lines @@
                 '../aura/aura.gyp:aura',
                 '../wm/wm.gyp:wm',
               ],
             }],
           ],
         },  # target_name: macviews_interactive_ui_tests
       ],  # targets
     }],
   ],  # conditions
 }