Refactor how WebCrypto NSS and OpenSSL specific files are included by GN build.

content/content_child.gypi

 # Copyright 2013 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',
     '../components/tracing.gyp:tracing',
     '../mojo/mojo.gyp:mojo_environment_chromium',
     '../mojo/mojo.gyp:mojo_service_provider_bindings',
@@ skipping 182 matching lines @@
       'child/web_socket_stream_handle_impl.h',
       'child/web_url_loader_impl.cc',
       'child/web_url_loader_impl.h',
       'child/webblobregistry_impl.cc',
       'child/webblobregistry_impl.h',
       'child/webcrypto/crypto_data.cc',
       'child/webcrypto/crypto_data.h',
       'child/webcrypto/jwk.cc',
       'child/webcrypto/jwk.h',
       'child/webcrypto/platform_crypto.h',
-      'child/webcrypto/platform_crypto_nss.cc',
-      'child/webcrypto/platform_crypto_openssl.cc',
       'child/webcrypto/shared_crypto.cc',
       'child/webcrypto/shared_crypto.h',
       'child/webcrypto/status.cc',
       'child/webcrypto/status.h',
       'child/webcrypto/webcrypto_impl.cc',
       'child/webcrypto/webcrypto_impl.h',
       'child/webcrypto/webcrypto_util.cc',
       'child/webcrypto/webcrypto_util.h',
       'child/webfallbackthemeengine_impl.cc',
       'child/webfallbackthemeengine_impl.h',
@@ skipping 13 matching lines @@
       'child/webthemeengine_impl_default.h',
       'child/webthemeengine_impl_mac.cc',
       'child/webthemeengine_impl_mac.h',
       'child/webthread_impl.cc',
       'child/webthread_impl.h',
       'child/worker_task_runner.cc',
       'child/worker_task_runner.h',
       'child/worker_thread_task_runner.cc',
       'child/worker_thread_task_runner.h',
     ],
+    'webcrypto_nss_sources': [
+      'child/webcrypto/platform_crypto_nss.cc',
+    ],
+    'webcrypto_openssl_sources': [
+      'child/webcrypto/platform_crypto_openssl.cc',
+    ],
   },
   'sources': [
     '<@(public_child_sources)',
     '<@(private_child_sources)',
   ],
   'conditions': [
     ['use_default_render_theme==0',
       {
         'sources/': [
           ['exclude', 'child/webthemeengine_impl_default.cc'],
@@ skipping 34 matching lines @@
       'sources!': [
         'child/npapi/webplugin_delegate_impl_mac.mm',
       ],
     }],
     ['OS=="win"', {
       'sources!': [
         'child/npapi/webplugin_delegate_impl_aura.cc',
       ],
     }],
     ['use_openssl==1', {
-      'sources!': [
-        'child/webcrypto/platform_crypto_nss.cc',
+      'sources': [
+        '<@(webcrypto_openssl_sources)',
       ],
       'dependencies': [
         '../third_party/openssl/openssl.gyp:openssl',
       ],
     }, {
-      'sources!': [
-        'child/webcrypto/platform_crypto_openssl.cc',
+      'sources': [
+        '<@(webcrypto_nss_sources)',
       ],
       'conditions': [
         ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android"', {
           'dependencies': [
             '../build/linux/system.gyp:ssl',
           ],
         }, {
           'dependencies': [
             '../third_party/nss/nss.gyp:nspr',
             '../third_party/nss/nss.gyp:nss',
           ],
         }],
       ],
     }],
   ],
 }