Fix python scripts in src/tools/

tools/valgrind/gdb_helper.py

-#!/usr/bin/python
-# Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+# 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.
 
-# gdb_helper.py
-
 ''' A bunch of helper functions for querying gdb.'''
 
 import logging
 import os
 import re
 import tempfile
 
 GDB_LINE_RE = re.compile(r'Line ([0-9]*) of "([^"]*)".*')
 
 def _GdbOutputToFileLine(output_line):
@@ skipping 49 matching lines @@
     else:
       self._binaries[binary] = [address]
     self._all_resolved = False
 
   def ResolveAll(self):
     ''' Carry out all lookup requests. '''
     self._translation = {}
     for binary in self._binaries.keys():
       if binary != '' and binary in self._load_addresses:
         load_address = self._load_addresses[binary]
-        addr = ResolveAddressesWithinABinary(binary, load_address, self._binaries[binary])
+        addr = ResolveAddressesWithinABinary(
+            binary, load_address, self._binaries[binary])
         self._translation[binary] = addr
     self._all_resolved = True
 
   def GetFileLine(self, binary, addr):
-    ''' Get the (filename, linenum) result of a previously-registered lookup request. '''
+    ''' Get the (filename, linenum) result of a previously-registered lookup
+    request.
+    '''
     if self._all_resolved:
       if binary in self._translation:
         if addr in self._translation[binary]:
           return self._translation[binary][addr]
     return (None, None)