Disk cache: Remove stats_histogram.

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 401 matching lines @@
       'disk_cache/blockfile/mapped_file.h',
       'disk_cache/blockfile/mapped_file_avoid_mmap_posix.cc',
       'disk_cache/blockfile/mapped_file_posix.cc',
       'disk_cache/blockfile/mapped_file_win.cc',
       'disk_cache/blockfile/rankings.cc',
       'disk_cache/blockfile/rankings.h',
       'disk_cache/blockfile/sparse_control.cc',
       'disk_cache/blockfile/sparse_control.h',
       'disk_cache/blockfile/stats.cc',
       'disk_cache/blockfile/stats.h',
-      'disk_cache/blockfile/stats_histogram.cc',
-      'disk_cache/blockfile/stats_histogram.h',
       'disk_cache/blockfile/storage_block-inl.h',
       'disk_cache/blockfile/storage_block.h',
       'disk_cache/blockfile/stress_support.h',
       'disk_cache/blockfile/trace.cc',
       'disk_cache/blockfile/trace.h',
       'disk_cache/cache_creator.cc',
       'disk_cache/cache_util.cc',
       'disk_cache/cache_util.h',
       'disk_cache/cache_util_posix.cc',
       'disk_cache/cache_util_win.cc',
@@ skipping 1274 matching lines @@
       'tools/quic/test_tools/quic_test_client.h',
       'tools/quic/test_tools/quic_test_utils.cc',
       'tools/quic/test_tools/quic_test_utils.h',
       'tools/quic/test_tools/server_thread.h',
       'tools/quic/test_tools/server_thread.cc',
       'tools/quic/test_tools/simple_client.h',
       'tools/quic/test_tools/simple_client.cc',
     ],
   }
 }