Implementing stateful directory tracking for dtrace on OSX.

tools/isolate/isolate_test.py

Index: tools/isolate/isolate_test.py
diff --git a/tools/isolate/isolate_test.py b/tools/isolate/isolate_test.py
index b4d94b2966fae90a041ac7f2d6f7320b8cecad2e..6d192123841dd4bafc2ac622ffb6ad40cc351bbb 100755
--- a/tools/isolate/isolate_test.py
+++ b/tools/isolate/isolate_test.py
@@ -225,22 +225,13 @@ class Isolate(unittest.TestCase):
     # cmd[0] is not generated from infiles[0] so it's not using a relative path.
     self._expected_result(
         False, ['isolate_test.py'], ['isolate_test.py', '--ok'], False)
-    if sys.platform == 'linux2':
-      expected = (
-          "{\n  'variables': {\n"
-          "    'isolate_files': [\n"
-          "      '<(DEPTH)/isolate_test.py',\n"
-          "    ],\n"
-          "    'isolate_dirs': [\n"
-          "    ],\n  },\n},\n")
-    else:
-      # TODO(maruel): BUG with relative paths on darwin.
-      expected = (
-          "{\n  'variables': {\n"
-          "    'isolate_files': [\n"
-          "    ],\n"
-          "    'isolate_dirs': [\n"
-          "    ],\n  },\n},\n")
+    expected = (
+        "{\n  'variables': {\n"
+        "    'isolate_files': [\n"
+        "      '<(DEPTH)/isolate_test.py',\n"
+        "    ],\n"
+        "    'isolate_dirs': [\n"
+        "    ],\n  },\n},\n")
     self.assertEquals(expected, out)