Move implementation of ChildProcessSecurityPolicyImpl to c/b/shared, and wrap in c/b

content/content_browser.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 1470 matching lines @@
       'browser/service_worker/service_worker_storage.cc',
       'browser/service_worker/service_worker_storage.h',
       'browser/service_worker/service_worker_unregister_job.cc',
       'browser/service_worker/service_worker_unregister_job.h',
       'browser/service_worker/service_worker_url_request_job.cc',
       'browser/service_worker/service_worker_url_request_job.h',
       'browser/service_worker/service_worker_version.cc',
       'browser/service_worker/service_worker_version.h',
       'browser/service_worker/service_worker_write_to_cache_job.cc',
       'browser/service_worker/service_worker_write_to_cache_job.h',
+      'browser/shared/child_process_security_policy_helper.cc',
+      'browser/shared/child_process_security_policy_helper.h',
       'browser/shared_worker/shared_worker_host.cc',
       'browser/shared_worker/shared_worker_host.h',
       'browser/shared_worker/shared_worker_instance.cc',
       'browser/shared_worker/shared_worker_instance.h',
       'browser/shared_worker/shared_worker_message_filter.cc',
       'browser/shared_worker/shared_worker_message_filter.h',
       'browser/shared_worker/shared_worker_service_impl.cc',
       'browser/shared_worker/shared_worker_service_impl.h',
       'browser/shared_worker/worker_document_set.cc',
       'browser/shared_worker/worker_document_set.h',
@@ skipping 693 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }