Fix python scripts in src/tools/

tools/valgrind/valgrind_test.py

Index: tools/valgrind/valgrind_test.py
diff --git a/tools/valgrind/valgrind_test.py b/tools/valgrind/valgrind_test.py
old mode 100755
new mode 100644
index bdc65571c8347626e2486613c0f4cde17a653de4..920df3fb0a50bb90811ce399ce13e3e8ff957f0e
--- a/tools/valgrind/valgrind_test.py
+++ b/tools/valgrind/valgrind_test.py
@@ -1,10 +1,7 @@
-#!/usr/bin/python
 # Copyright (c) 2011 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.
 
-# valgrind_test.py
-
 """Runs an exe through Valgrind and puts the intermediate files in a
 directory.
 """
@@ -1189,7 +1186,3 @@ class ToolFactory:
 
 def CreateTool(tool):
   return ToolFactory().Create(tool)
-
-if __name__ == '__main__':
-  logging.error(sys.argv[0] + " can not be run from command line")
-  sys.exit(1)