Add everything from src/tools/isolate r159537.

tests/isolate/symlink_partial.isolate

Index: tests/isolate/symlink_partial.isolate
diff --git a/tests/isolate/symlink_partial.isolate b/tests/isolate/symlink_partial.isolate
new file mode 100644
index 0000000000000000000000000000000000000000..750889e816766f5488bf30a09db56fc7540643ea
--- /dev/null
+++ b/tests/isolate/symlink_partial.isolate
@@ -0,0 +1,17 @@
+# 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.
+{
+  'variables': {
+    'command': [
+      'python',
+      'symlink_partial.py',
+    ],
+    'isolate_dependency_tracked': [
+      'symlink_partial.py',
+    ],
+    'isolate_dependency_untracked': [
+      'files2/test_file2.txt',
+    ],
+  },
+}