Create separate list for win and win-64 bisect in order to generate appropriate perf config.

tools/perf/core/trybot_command.py

 # Copyright 2015 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.
 
 import argparse
 import os
 import logging
 import re
 import subprocess
 import urllib2
@@ skipping 79 matching lines @@
       bot_platform += '-x64'
     return {bot_platform: bot}
 
   platform_and_bots = {}
   for os_name in os_names:
     platform_and_bots[os_name] = [bot for bot in builders if os_name in bot]
 
   # Special case for Windows x64, consider it as separate platform
   # config config should contain target_arch=x64 and --browser=release_x64.
   win_x64_bots = [
-      platform_and_bots['win'].pop(i)
-      for i, win_bot in enumerate(platform_and_bots['win'])
+      win_bot for win_bot in platform_and_bots['win']
       if 'x64' in win_bot]
+  # Separate out non x64 bits win bots
+  platform_and_bots['win'] = list(
+      set(platform_and_bots['win']) - set(win_x64_bots))
   platform_and_bots['win-x64'] = win_x64_bots
 
   if 'all-win' in trybot_name:
     return {'win': platform_and_bots['win'],
             'win-x64': platform_and_bots['win-x64']}
   if 'all-mac' in trybot_name:
     return {'mac': platform_and_bots['mac']}
   if 'all-android' in trybot_name:
     return {'android': platform_and_bots['android']}
   if 'all-linux' in trybot_name:
@@ skipping 312 matching lines @@
         return ERROR  # pylint: disable=lost-exception
       logging.info('Checked out original branch: %s', original_branchname)
       returncode, out, err = _RunProcess(
           ['git', 'branch', '-D', 'telemetry-tryjob'])
       if returncode:
         logging.error('Could not delete telemetry-tryjob branch. '
                       'Please delete it manually: %s', err)
         return ERROR  # pylint: disable=lost-exception
       logging.info('Deleted temp branch: telemetry-tryjob')
     return SUCCESS