WebCrypto: Implement digest() using NSS

content/content_renderer.gypi

Index: content/content_renderer.gypi
diff --git a/content/content_renderer.gypi b/content/content_renderer.gypi
index 9d843eee0c771bd8cc84ce21e9cff1552f281477..6d5117760fae4c197501595d43c334b8f4b548ba 100644
--- a/content/content_renderer.gypi
+++ b/content/content_renderer.gypi
@@ -502,6 +502,8 @@
     'renderer/web_ui_extension_data.h',
     'renderer/webcrypto_impl.cc',
     'renderer/webcrypto_impl.h',
+    'renderer/webcrypto_impl_nss.cc',
+    'renderer/webcrypto_impl_openssl.cc',
     'renderer/websharedworker_proxy.cc',
     'renderer/websharedworker_proxy.h',
     'renderer/websharedworkerrepository_impl.cc',
@@ -695,6 +697,30 @@
         'renderer/pepper/ppb_open_gl_es_impl.cc',
       ],
     }],
+    ['use_openssl==1', {
+      'sources!': [
+        'renderer/webcrypto_impl_nss.cc',
+      ],
+      'dependencies': [
+        '../third_party/openssl/openssl.gyp:openssl',
+      ],
+    }, {
+      'sources!': [
+        'renderer/webcrypto_impl_openssl.cc',
+      ],
+      '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',
+          ],
+        }],
+      ],
+    }],
   ],
   'target_conditions': [
     ['OS=="android"', {