Remove the unused sampling profiler.

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,
     },
     'target_conditions': [
@@ skipping 613 matching lines @@
           'win/message_window.cc',
           'win/message_window.h',
           'win/metro.cc',
           'win/metro.h',
           'win/object_watcher.cc',
           'win/object_watcher.h',
           'win/registry.cc',
           'win/registry.h',
           'win/resource_util.cc',
           'win/resource_util.h',
-          'win/sampling_profiler.cc',
-          'win/sampling_profiler.h',
           'win/scoped_bstr.cc',
           'win/scoped_bstr.h',
           'win/scoped_co_mem.h',
           'win/scoped_com_initializer.h',
           'win/scoped_comptr.h',
           'win/scoped_gdi_object.h',
           'win/scoped_handle.cc',
           'win/scoped_handle.h',
           'win/scoped_hdc.h',
           'win/scoped_hglobal.h',
@@ skipping 242 matching lines @@
           ['<(use_system_nspr)==1 and >(nacl_untrusted_build)==0', {
             'sources/': [
               ['exclude', '^third_party/nspr/'],
             ],
           }],
         ],
       }],
     ],
   },
 }