net: Implement canceling of all async operations in FileStream.

net/net.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'linux_link_kerberos%': 0,
     'conditions': [
@@ skipping 116 matching lines @@
         'base/dnssec_chain_verifier.h',
         'base/dnssec_keyset.cc',
         'base/dnssec_keyset.h',
         'base/escape.cc',
         'base/escape.h',
         'base/ev_root_ca_metadata.cc',
         'base/ev_root_ca_metadata.h',
         'base/expiring_cache.h',
         'base/file_stream.cc',
         'base/file_stream.h',
+        'base/file_stream_context.cc',
+        'base/file_stream_context.h',
+        'base/file_stream_context_posix.cc',
+        'base/file_stream_context_win.cc',
         'base/file_stream_metrics.cc',
         'base/file_stream_metrics.h',
         'base/file_stream_metrics_posix.cc',
         'base/file_stream_metrics_win.cc',
         'base/file_stream_net_log_parameters.cc',
         'base/file_stream_net_log_parameters.h',
-        'base/file_stream_posix.cc',
-        'base/file_stream_posix.h',
         'base/file_stream_whence.h',
-        'base/file_stream_win.cc',
-        'base/file_stream_win.h',
         'base/filter.cc',
         'base/filter.h',
         'base/gzip_filter.cc',
         'base/gzip_filter.h',
         'base/gzip_header.cc',
         'base/gzip_header.h',
         'base/host_cache.cc',
         'base/host_cache.h',
         'base/host_mapping_rules.cc',
         'base/host_mapping_rules.h',
@@ skipping 2204 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'net_unittests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }