Temporarily fix downloads via support binaries on windows.

tools/telemetry/catapult_base/support_binaries.py

 # Copyright 2014 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 os
 import stat
 
 from catapult_base import cloud_storage
 from telemetry import decorators
 from telemetry.internal.util import path
@@ skipping 38 matching lines @@
   if not command and _IsInCloudStorage(binary_name, arch_name, platform_name):
     cloud_storage.GetIfChanged(
         _GetBinPath(binary_name, arch_name, platform_name),
                     cloud_storage.PUBLIC_BUCKET)
     command = _GetBinPath(binary_name, arch_name, platform_name)
 
     # Ensure the downloaded file is actually executable.
     if command and os.path.exists(command):
       os.chmod(command,
                stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP)
+  if not command and platform_name == 'win' and arch_name != 'AMD64':
+    # This is an awful, awful hack to temporarily fix cloud_storage downloads
+    # on XP until the binary_manager is finished and migrated to.
+    # Please don't try this at home.
+    return FindPath(binary_name, 'AMD64', platform_name)
 
   # Return an absolute path consistently.
   if command:
     command = os.path.abspath(command)
   return command