Added a new SafeSPrintf() function that implements snprintf() in an async-safe-fashion

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 110 matching lines @@
           'debug/alias.cc',
           'debug/alias.h',
           'debug/crash_logging.cc',
           'debug/crash_logging.h',
           'debug/debug_on_start_win.cc',
           'debug/debug_on_start_win.h',
           'debug/debugger.cc',
           'debug/debugger.h',
           'debug/debugger_posix.cc',
           'debug/debugger_win.cc',
+          'debug/format.cc',
+          'debug/format.h',
           # This file depends on files from the 'allocator' target,
           # but this target does not depend on 'allocator' (see
           # allocator.gyp for details).
           'debug/leak_annotations.h',
           'debug/leak_tracker.h',
           'debug/proc_maps_linux.cc',
           'debug/proc_maps_linux.h',
           'debug/profiler.cc',
           'debug/profiler.h',
           'debug/stack_trace.cc',
@@ skipping 736 matching lines @@
           ['<(use_system_nspr)==1 and >(nacl_untrusted_build)==0', {
             'sources/': [
               ['exclude', '^third_party/nspr/'],
             ],
           }],
         ],
       }],
     ],
   },
 }