Add a Java API for UMA histograms.

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,
       'base_i18n_target': 0,
     },
@@ skipping 54 matching lines @@
           'android/library_loader/library_loader_hooks.h',
           'android/library_loader/library_load_from_apk_status_codes.h',
           'android/memory_pressure_listener_android.cc',
           'android/memory_pressure_listener_android.h',
           'android/java_handler_thread.cc',
           'android/java_handler_thread.h',
           'android/path_service_android.cc',
           'android/path_service_android.h',
           'android/path_utils.cc',
           'android/path_utils.h',
+          'android/record_histogram.cc',
+          'android/record_histogram.h',
           'android/sys_utils.cc',
           'android/sys_utils.h',
           'android/thread_utils.h',
           'android/trace_event_binding.cc',
           'android/trace_event_binding.h',
           'at_exit.cc',
           'at_exit.h',
           'atomic_ref_count.h',
           'atomic_sequence_num.h',
           'atomicops.h',
@@ skipping 944 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }