Implement THROTTLED priority semantics.

net/net.gypi

 # Copyright 2014 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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 342 matching lines @@
       'base/network_change_notifier_win.h',
       'base/network_config_watcher_mac.cc',
       'base/network_config_watcher_mac.h',
       'base/network_delegate.cc',
       'base/network_delegate.h',
       'base/network_delegate_impl.cc',
       'base/network_delegate_impl.h',
       'base/network_interfaces_linux.cc',
       'base/network_interfaces_mac.cc',
       'base/network_interfaces_win.cc',
-      'base/network_throttle_manager.cc',
       'base/network_throttle_manager.h',
+      'base/network_throttle_manager_impl.cc',
+      'base/network_throttle_manager_impl.h',
+      'base/percentile_estimator.cc',
+      'base/percentile_estimator.h',
       'base/platform_mime_util.h',
       'base/platform_mime_util_linux.cc',
       'base/platform_mime_util_mac.mm',
       'base/platform_mime_util_win.cc',
       'base/prioritized_dispatcher.cc',
       'base/prioritized_dispatcher.h',
       'base/priority_queue.h',
       'base/proxy_delegate.h',
       'base/request_priority.cc',
       'base/request_priority.h',
@@ skipping 1047 matching lines @@
       'base/ip_pattern_unittest.cc',
       'base/keygen_handler_unittest.cc',
       'base/layered_network_delegate_unittest.cc',
       'base/lookup_string_in_fixed_set_unittest.cc',
       'base/mime_sniffer_unittest.cc',
       'base/mime_util_unittest.cc',
       'base/network_activity_monitor_unittest.cc',
       'base/network_change_notifier_unittest.cc',
       'base/network_change_notifier_win_unittest.cc',
       'base/network_interfaces_unittest.cc',
-      'base/network_throttle_manager_unittest.cc',
+      'base/network_throttle_manager_impl_unittest.cc',
       'base/parse_number_unittest.cc',
+      'base/percentile_estimator_unittest.cc',
       'base/port_util_unittest.cc',
       'base/prioritized_dispatcher_unittest.cc',
       'base/priority_queue_unittest.cc',
       'base/registry_controlled_domains/registry_controlled_domain_unittest.cc',
       'base/sdch_dictionary_unittest.cc',
       'base/sdch_manager_unittest.cc',
       'base/static_cookie_policy_unittest.cc',
       'base/test_completion_callback_unittest.cc',
       'base/test_proxy_delegate.cc',
       'base/test_proxy_delegate.h',
@@ skipping 1864 matching lines @@
       'third_party/nist-pkits/crls/requireExplicitPolicy5subCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy5subsubCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy5subsubsubCACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7CACRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subCARE2CRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subsubCARE2RE4CRL.crl',
       'third_party/nist-pkits/crls/requireExplicitPolicy7subsubsubCARE2RE4CRL.crl',
     ],
   }
 }