Add more Rappor metrics

chrome/chrome_tests_unit.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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1204 matching lines @@
         'browser/profiles/gaia_info_update_service_unittest.cc',
         'browser/profiles/incognito_mode_policy_handler_unittest.cc',
         'browser/profiles/off_the_record_profile_impl_unittest.cc',
         'browser/profiles/profile_downloader_unittest.cc',
         'browser/profiles/profile_info_cache_unittest.cc',
         'browser/profiles/profile_info_cache_unittest.h',
         'browser/profiles/profile_avatar_icon_util_unittest.cc',
         'browser/profiles/profile_list_desktop_unittest.cc',
         'browser/profiles/profile_manager_unittest.cc',
         'browser/profiles/profile_shortcut_manager_unittest_win.cc',
+        'browser/rappor/sampling_unittest.cc',
         'browser/renderer_context_menu/context_menu_content_type_unittest.cc',
         'browser/renderer_context_menu/render_view_context_menu_test_util.cc',
         'browser/renderer_context_menu/render_view_context_menu_test_util.h',
         'browser/renderer_context_menu/render_view_context_menu_unittest.cc',
         'browser/renderer_host/web_cache_manager_unittest.cc',
         'browser/renderer_host/chrome_render_widget_host_view_mac_history_swiper_unit_test.mm',
         'browser/resources/chromeos/braille_ime/braille_ime.js',
         'browser/resources/chromeos/braille_ime/braille_ime_unittest.gtestjs',
         'browser/resources/google_now/background.js',
         'browser/resources/google_now/background_test_util.js',
@@ skipping 1623 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }