Added test support to observe and verify UMA user actions during tests.

base/base.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 613 matching lines @@
         'system_monitor/system_monitor_unittest.cc',
         'task/cancelable_task_tracker_unittest.cc',
         'task_runner_util_unittest.cc',
         'template_util_unittest.cc',
         'test/expectations/expectation_unittest.cc',
         'test/expectations/parser_unittest.cc',
         'test/histogram_tester_unittest.cc',
         'test/test_pending_task_unittest.cc',
         'test/test_reg_util_win_unittest.cc',
         'test/trace_event_analyzer_unittest.cc',
+        'test/user_action_tester_unittest.cc',
         'threading/non_thread_safe_unittest.cc',
         'threading/platform_thread_unittest.cc',
         'threading/sequenced_worker_pool_unittest.cc',
         'threading/simple_thread_unittest.cc',
         'threading/thread_checker_unittest.cc',
         'threading/thread_collision_warner_unittest.cc',
         'threading/thread_id_name_manager_unittest.cc',
         'threading/thread_local_storage_unittest.cc',
         'threading/thread_local_unittest.cc',
         'threading/thread_unittest.cc',
@@ skipping 358 matching lines @@
         'test/test_switches.cc',
         'test/test_switches.h',
         'test/test_timeouts.cc',
         'test/test_timeouts.h',
         'test/thread_test_helper.cc',
         'test/thread_test_helper.h',
         'test/trace_event_analyzer.cc',
         'test/trace_event_analyzer.h',
         'test/trace_to_file.cc',
         'test/trace_to_file.h',
+        'test/user_action_tester.cc',
+        'test/user_action_tester.h',
         'test/values_test_util.cc',
         'test/values_test_util.h',
       ],
       'target_conditions': [
         ['OS == "ios"', {
           'sources/': [
             # Pull in specific Mac files for iOS (which have been filtered out
             # by file name rules).
             ['include', '^test/test_file_util_mac\\.cc$'],
           ],
@@ skipping 576 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }