Move startup_helper_win.cc to separate target for incremental build

content/content_app.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.
 
 {
   'include_dirs': [
     '..',
   ],
   'dependencies': [
     '../base/base.gyp:base',
     '../base/base.gyp:base_i18n',
     '../crypto/crypto.gyp:crypto',
     '../ui/base/ui_base.gyp:ui_base',
     '../ui/gfx/gfx.gyp:gfx',
     '../ui/gfx/gfx.gyp:gfx_geometry',
   ],
   'sources': [
     'app/android/app_jni_registrar.cc',
     'app/android/app_jni_registrar.h',
     'app/android/child_process_service.cc',
     'app/android/child_process_service.h',
     'app/android/content_main.cc',
     'app/android/content_main.h',
     'app/android/library_loader_hooks.cc',
     'app/content_main.cc',
     'app/content_main_runner.cc',
     'app/mojo/mojo_init.cc',
     'app/mojo/mojo_init.h',
-    'app/startup_helper_win.cc',
     'public/app/android_library_loader_hooks.h',
     'public/app/content_main.h',
     'public/app/content_main_delegate.cc',
     'public/app/content_main_delegate.h',
     'public/app/content_main_runner.h',
-    'public/app/startup_helper_win.h',
   ],
   'conditions': [
     ['((OS=="linux" and os_posix==1 and use_aura==1) or OS=="android") and use_allocator!="none"', {
       'dependencies': [
         # This is needed by app/content_main_runner.cc
         '../base/allocator/allocator.gyp:allocator',
       ],
     }],
-    ['OS=="win"', {
-      'dependencies': [
-        '../sandbox/sandbox.gyp:sandbox',
-      ],
-    }],
     ['OS=="android"', {
       'sources!': [
         'app/content_main.cc',
       ],
       'dependencies': [
         'content.gyp:content_jni_headers',
         '../skia/skia.gyp:skia',
       ],
       'includes': [
         '../build/android/cpufeatures.gypi',
       ],
     }],
+    ['OS=="win"', {
+      'dependencies': [
+        'content_startup_helper_win',
+      ],
+    }],
     ['OS=="ios"', {
       'sources!': [
         'app/content_main.cc',
         'app/mojo/mojo_init.cc',
         'app/mojo/mojo_init.h',
       ],
     }, {  # OS!="ios"
       'dependencies': [
         '../mojo/mojo_base.gyp:mojo_application_bindings',
         '../mojo/mojo_base.gyp:mojo_environment_chromium',
         '../mojo/mojo_base.gyp:mojo_system_impl',
         '../mojo/mojo.gyp:mojo_application_manager',
      ],
     }],
   ],
 }