Add a Physical Web data source

ios/chrome/common/physical_web/physical_web.gyp

 # Copyright 2015 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.
 
 {
   'targets':[
     {
       # GN version: //ios/chrome/common/physical_web
       'target_name': 'physical_web',
       'type': 'static_library',
       'sources': [
+        'physical_web_data_source_ios.h',
+        'physical_web_data_source_ios.mm',
         'physical_web_device.h',
         'physical_web_device.mm',
         'physical_web_request.h',
         'physical_web_request.mm',
         'physical_web_scanner.h',
         'physical_web_scanner.mm',
         'physical_web_types.h',
         'physical_web_types.mm',
       ],
       'dependencies': [
         '../../../../base/base.gyp:base',
+        '../../../../components/components.gyp:physical_web_data_source',
         '../../../../components/components.gyp:version_info',
         '../../../../device/bluetooth/bluetooth.gyp:uribeacon',
         '../../../../google_apis/google_apis.gyp:google_apis',
         '../../../../ios/web/ios_web.gyp:user_agent',
       ],
       'link_settings': {
         'libraries': [
           '$(SDKROOT)/System/Library/Frameworks/CoreBluetooth.framework',
           '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
         ],
       },
     }
   ]
 }