Histograms - Support histograms for Plugins, GPU

base/base.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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
     },
     'target_conditions': [
@@ skipping 214 matching lines @@
           'message_pump.cc',
           'message_pump.h',
           'message_pump_android.cc',
           'message_pump_android.h',
           'message_pump_default.cc',
           'message_pump_default.h',
           'message_pump_win.cc',
           'message_pump_win.h',
           'metrics/histogram.cc',
           'metrics/histogram.h',
+          'metrics/histogram_flattener.h',
+          'metrics/histogram_snapshot_manager.cc',
+          'metrics/histogram_snapshot_manager.h',
           'metrics/stats_counters.cc',
           'metrics/stats_counters.h',
           'metrics/stats_table.cc',
           'metrics/stats_table.h',
           'move.h',
           'native_library.h',
           'native_library_mac.mm',
           'native_library_posix.cc',
           'native_library_win.cc',
           'observer_list.h',
@@ skipping 697 matching lines @@
             'third_party/xdg_mime/xdgmimemagic.c',
             'third_party/xdg_mime/xdgmimemagic.h',
             'third_party/xdg_mime/xdgmimeparent.c',
             'third_party/xdg_mime/xdgmimeparent.h',
           ],
         },
       ],
     }],
   ],
 }