Run auto-spell-checker (codespell) on files in depot_tools.

upload_to_google_storage.py

Index: upload_to_google_storage.py
diff --git a/upload_to_google_storage.py b/upload_to_google_storage.py
index 83f2f0e1648f74b92757858011844806b357b0d4..e53cef026d71fe63c07567e64a4ee67f9c8daace 100755
--- a/upload_to_google_storage.py
+++ b/upload_to_google_storage.py
@@ -123,7 +123,7 @@ def get_targets(args, parser, use_null_terminator):
     parser.error('Missing target.')
 
   if len(args) == 1 and args[0] == '-':
-    # Take stdin as a newline or null seperated list of files.
+    # Take stdin as a newline or null separated list of files.
     if use_null_terminator:
       return sys.stdin.read().split('\0')
     else: