Move chrome.documentScan API to extensions/

extensions/extensions_tests.gyp

 {
   'variables': {
     # Product name is used for Mac bundle.
     'app_shell_product_name': 'App Shell',
     # The version is high enough to be supported by Omaha (at least 31)
     # but fake enough to be obviously not a Chrome release.
     'app_shell_version': '38.1234.5678.9',
     'chromium_code': 1,
   },
   'targets': [
@@ skipping 42 matching lines @@
         'browser/api/cast_channel/cast_transport_unittest.cc',
         'browser/api/cast_channel/keep_alive_delegate_unittest.cc',
         'browser/api/cast_channel/logger_unittest.cc',
         'browser/api/cast_channel/test_util.cc',
         'browser/api/cast_channel/test_util.h',
         'browser/api/declarative/declarative_rule_unittest.cc',
         'browser/api/declarative/deduping_factory_unittest.cc',
         'browser/api/declarative/rules_registry_unittest.cc',
         'browser/api/declarative_webrequest/webrequest_condition_unittest.cc',
         'browser/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc',
+        'browser/api/document_scan/document_scan_api_unittest.cc',
+        'browser/api/document_scan/document_scan_interface_chromeos_unittest.cc',
+        'browser/api/document_scan/mock_document_scan_interface.cc',
         'browser/api/idle/idle_api_unittest.cc',
         'browser/api/mime_handler_private/mime_handler_private_unittest.cc',
         'browser/api/networking_config/networking_config_service_chromeos_unittest.cc',
         'browser/api/power/power_api_unittest.cc',
         'browser/api/sockets_tcp/sockets_tcp_api_unittest.cc',
         'browser/api/sockets_udp/sockets_udp_api_unittest.cc',
         'browser/api/storage/settings_quota_unittest.cc',
         'browser/api/storage/storage_api_unittest.cc',
         'browser/api/storage/storage_frontend_unittest.cc',
         'browser/api/web_request/form_data_parser_unittest.cc',
@@ skipping 81 matching lines @@
         'utility/unpacker_unittest.cc',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
+        ['chromeos==1', {
+          'dependencies': [
+            '<(DEPTH)/chromeos/chromeos.gyp:chromeos_test_support',
+          ],
+        }],
       ],
     },
     {
       # GN version: //extensions:extensions_browsertests
       'target_name': 'extensions_browsertests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         'extensions.gyp:extensions_test_support',
         'shell/app_shell.gyp:app_shell_lib',
         # TODO(yoz): find the right deps
@@ skipping 74 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'extensions_browsertests.isolate',
           ],
         },
       ],
     }],
   ],
 }