Fix python scripts in src/tools/

tools/site_compare/drivers/win32/keyboard.py

-#!/usr/bin/python2.4
+#!/usr/bin/env python
 # Copyright (c) 2006-2008 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.
 
 """SiteCompare module for simulating keyboard input.
 
 This module contains functions that can be used to simulate a user
 pressing keys on a keyboard. Support is provided for formatted strings
 including special characters to represent modifier keys like CTRL and ALT
 """
@@ skipping 147 matching lines @@
 
       # Type the key with the specified length, then wait the specified delay
       TypeKey(vk & 0xFF, keystroke_time)
       time.sleep(time_between_keystrokes)
 
   # Release the modifier keys, if held
   if shift_held: PressKey(False, win32con.VK_SHIFT)
   if ctrl_held:  PressKey(False, win32con.VK_CONTROL)
   if alt_held:   PressKey(False, win32con.VK_MENU)
 
-if __name__ == "__main__":
+
+def main():
   # We're being invoked rather than imported. Let's do some tests
 
   # Press command-R to bring up the Run dialog
   PressKey(True, win32con.VK_LWIN)
   TypeKey(ord('R'))
   PressKey(False, win32con.VK_LWIN)
 
   # Wait a sec to make sure it comes up
   time.sleep(1)
 
   # Invoke Notepad through the Run dialog
   TypeString("wordpad\n")
 
   # Wait another sec, then start typing
   time.sleep(1)
   TypeString("This is a test of SiteCompare's Keyboard.py module.\n\n")
   TypeString("There should be a blank line above and below this one.\n\n")
   TypeString("This line has control characters to make "
              "[b]boldface text[b] and [i]italic text[i] and normal text.\n\n",
              use_modifiers=True)
   TypeString(r"This line should be typed with a visible delay between "
              "characters. When it ends, there should be a 3-second pause, "
              "then the menu will select File/Exit, then another 3-second "
              "pause, then No to exit without saving. Ready?\p\p\p{f}x\p\p\pn",
              use_modifiers=True,
              keystroke_time=0.05,
              time_between_keystrokes=0.05)
 
 
+if __name__ == "__main__":
+  sys.exit(main())