[Clean up] Move VariationsHttpHeaderProvider into a subdirectory.

components/components_tests.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': {
     # This turns on e.g. the filename-based detection of which
     # platforms to include source files on (e.g. files ending in
     # _mac.h or _mac.cc are only compiled on MacOSX).
     'chromium_code': 1,
@@ skipping 233 matching lines @@
             'url_matcher/regex_set_matcher_unittest.cc',
             'url_matcher/string_pattern_unittest.cc',
             'url_matcher/substring_set_matcher_unittest.cc',
             'url_matcher/url_matcher_factory_unittest.cc',
             'url_matcher/url_matcher_unittest.cc',
             'url_fixer/url_fixer_unittest.cc',
             'variations/active_field_trials_unittest.cc',
             'variations/caching_permuted_entropy_provider_unittest.cc',
             'variations/entropy_provider_unittest.cc',
             'variations/metrics_util_unittest.cc',
+            'variations/net/variations_http_header_provider_unittest.cc',
             'variations/study_filtering_unittest.cc',
             'variations/variations_associated_data_unittest.cc',
-            'variations/variations_http_header_provider_unittest.cc',
             'variations/variations_seed_processor_unittest.cc',
             'variations/variations_seed_simulator_unittest.cc',
             'visitedlink/test/visitedlink_unittest.cc',
             'web_cache/browser/web_cache_manager_unittest.cc',
             'web_modal/web_contents_modal_dialog_manager_unittest.cc',
             'webdata/common/web_database_migration_unittest.cc',
           ],
           'include_dirs': [
             '..',
           ],
@@ skipping 716 matching lines @@
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }