Reland: Implement Aura side of unified touch text selection for contents

ui/touch_selection/ui_touch_selection.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 45 matching lines @@
           'sources!': [
             'touch_handle_drawable_aura.cc',
             'touch_handle_drawable_aura.h',
             'touch_selection_menu_runner.cc',
             'touch_selection_menu_runner.h',
           ],
         }],
       ],
     },
     {
+      'target_name': 'ui_touch_selection_test_support',
+      'type': 'static_library',
+      'dependencies': [
+        'ui_touch_selection',
+      ],
+      'sources': [
+        'touch_selection_controller_test_api.cc',
+        'touch_selection_controller_test_api.h',
+      ],
+    },
+    {
       'target_name': 'ui_touch_selection_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:run_all_unittests',
         '../../base/base.gyp:test_support_base',
         '../../testing/gmock.gyp:gmock',
         '../../testing/gtest.gyp:gtest',
         '../base/ui_base.gyp:ui_base',
         '../events/events.gyp:events_test_support',
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_test_support',
         'ui_touch_selection',
+        'ui_touch_selection_test_support',
       ],
       'sources': [
         'longpress_drag_selector_unittest.cc',
         'touch_handle_unittest.cc',
         'touch_selection_controller_unittest.cc',
       ],
       'include_dirs': [
         '../..',
       ],
       'conditions': [
@@ skipping 56 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }