Add a run_eslint wrapper script

common/eslint/bin/run_eslint

Index: common/eslint/bin/run_eslint
diff --git a/systrace/bin/systrace b/common/eslint/bin/run_eslint
similarity index 50%
copy from systrace/bin/systrace
copy to common/eslint/bin/run_eslint
index bce86a7fd1460a4c3b82d3c72dccc26682acf497..4fe98971f48240e3264e78405a21170b9da86b5e 100755
--- a/systrace/bin/systrace
+++ b/common/eslint/bin/run_eslint
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-
 # Copyright 2016 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.
@@ -7,10 +6,21 @@
 import os
 import sys
 
-_SYSTRACE_DIR = os.path.abspath(
+
+_ESLINT_PATH = os.path.abspath(
     os.path.join(os.path.dirname(__file__), os.path.pardir))
-sys.path.insert(0, _SYSTRACE_DIR)
-from systrace import run_systrace
+
+
+def _AddToPathIfNeeded(path):
+  if path not in sys.path:
+    sys.path.insert(0, path)
+
 
 if __name__ == '__main__':
-  sys.exit(run_systrace.main())
+  _AddToPathIfNeeded(_ESLINT_PATH)
+  from eslint import eslint
+
+  if len(sys.argv) == 1:
+    print eslint.RunEslintGlobal()
+  else:
+    print eslint.RunEslint(sys.argv[1:])