Revert r50648, except a minor change to sha1_portable.cc....

base/base.gypi

 # Copyright (c) 2010 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_extra_target': 0,
     },
@@ skipping 331 matching lines @@
               ],
           },],
           [ 'OS == "win"', {
               'include_dirs': [
                 '<(DEPTH)/third_party/wtl/include',
               ],
               'sources!': [
                 'event_recorder_stubs.cc',
                 'file_descriptor_shuffle.cc',
                 'message_pump_libevent.cc',
-                'sha1_portable.cc',
+                # Not using sha1_win.cc because it may have caused a
+                # regression to page cycler moz.
+                'sha1_win.cc',
                 'string16.cc',
                 'trace_event.cc',
               ],
           },],
         ],
       }],
       ['base_extra_target', {
         'sources': [
           'crypto/capi_util.cc',
           'crypto/capi_util.h',
@@ skipping 366 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',
           ],
         },
       ],
     }],
   ],
 }