Add support for component=shared_library for base_unittests_run.

net/third_party/nss/ssl.isolate

+# Copyright (c) 2014 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.
+{
+  'conditions': [
+    # TODO(maruel): Add 'and use_system_ssl==0' once it is consistently defined.

[Ryan Sleevi, 2014/01/22 02:21:44]

Feel free to remove this TODO - https://codereview.chromium.org/139743009/

[M-A Ruel, 2014/01/22 02:23:54]

Ah! Removed here and in build/isolate.gypi.

+    ['OS=="linux" and component=="shared_library" and use_openssl==0', {
+      'variables': {
+        'isolate_dependency_tracked': [
+          '<(PRODUCT_DIR)/lib/libcrssl.so',
+        ],
+      },
+    }],
+  ],
+}