Add InterestsFetcher which retrieves a user's interests from the server.

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 527 matching lines @@
       'browser/install_verification/win/loaded_modules_snapshot.h',
       'browser/install_verification/win/module_ids.cc',
       'browser/install_verification/win/module_ids.h',
       'browser/install_verification/win/module_info.h',
       'browser/install_verification/win/module_list.cc',
       'browser/install_verification/win/module_list.h',
       'browser/install_verification/win/module_verification_common.cc',
       'browser/install_verification/win/module_verification_common.h',
       'browser/internal_auth.cc',
       'browser/internal_auth.h',
+      'browser/interests/interests_retriever.h',
+      'browser/interests/interests_retriever.cc',
       'browser/interstitials/chrome_metrics_helper.cc',
       'browser/interstitials/chrome_metrics_helper.h',
       'browser/interstitials/security_interstitial_page.cc',
       'browser/interstitials/security_interstitial_page.h',
       'browser/intranet_redirect_detector.cc',
       'browser/intranet_redirect_detector.h',
       'browser/invalidation/invalidation_service_factory_android.cc',
       'browser/invalidation/invalidation_service_factory_android.h',
       'browser/invalidation/profile_invalidation_provider_factory.cc',
       'browser/invalidation/profile_invalidation_provider_factory.h',
@@ skipping 3557 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }