Add a histogram to measure browser window display

chrome/chrome_common.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 249 matching lines @@
         'common/service_process_util.h',
         'common/service_process_util_linux.cc',
         'common/service_process_util_mac.mm',
         'common/service_process_util_posix.cc',
         'common/service_process_util_posix.h',
         'common/service_process_util_win.cc',
         'common/spellcheck_common.cc',
         'common/spellcheck_common.h',
         'common/spellcheck_messages.h',
         'common/spellcheck_result.h',
+        'common/startup_metric_utils.cc',
+        'common/startup_metric_utils.h',
         'common/string_ordinal.cc',
         'common/string_ordinal.h',
         'common/switch_utils.cc',
         'common/switch_utils.h',
         'common/thumbnail_score.cc',
         'common/thumbnail_score.h',
         'common/thumbnail_support.cc',
         'common/thumbnail_support.h',
         'common/time_format.cc',
         'common/time_format.h',
@@ skipping 257 matching lines @@
         'common/metrics/proto/user_action_event.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }