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, 2014/01/21 19:43:50]

?

[M-A Ruel, 2014/01/21 20:00:29]

use_system_ssl is defined build/linux/system.gyp but this is not consistently
defined on other platforms. This results in gyp throwing up on non-linux
platforms.

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