Error message should be "download_from_google_storage is not in your PATH, please add it or install depot_tools and then add its directory to your PATH"

Downloading https://commondatastorage.googleapis.com/chromium-browser-clang/Linux_x64/clang-289944-2.tgz .......... Done.
Creating directory /usr/local/google/home/chrishtr/git/chromium/src/third_party/llvm-build/Release+Asserts
clang 289944-2 unpacked

________ running '/usr/bin/python src/build/util/lastchange.py -o src/build/util/LASTCHANGE' in '/usr/local/google/home/chrishtr/git/chromium'

________ running '/usr/bin/python src/build/util/lastchange.py --git-hash-only -s src/third_party/WebKit -o src/build/util/LASTCHANGE.blink' in '/usr/local/google/home/chrishtr/git/chromium'

________ running '/usr/bin/python src/build/util/lastchange.py -m SKIA_COMMIT_HASH -s src/third_party/skia --header src/skia/ext/skia_commit_hash.h' in '/usr/local/google/home/chrishtr/git/chromium'

________ running 'download_from_google_storage --no_resume --platform=win32 --no_auth --bucket chromium-gn -s src/buildtools/win/gn.exe.sha1' in '/usr/local/google/home/chrishtr/git/chromium'
Traceback (most recent call last):
  File "/usr/local/google/home/chrishtr/depot_tools/gclient.py", line 2128, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/usr/local/google/home/chrishtr/depot_tools/gclient.py", line 2114, in main
    return dispatcher.execute(OptionParser(), argv)
  File "/usr/local/google/home/chrishtr/depot_tools/subcommand.py", line 252, in execute
    return command(parser, args[1:])
  File "/usr/local/google/home/chrishtr/depot_tools/gclient.py", line 1957, in CMDrunhooks
    return client.RunOnDeps('runhooks', args)
  File "/usr/local/google/home/chrishtr/depot_tools/gclient.py", line 1371, in RunOnDeps
    self.RunHooksRecursively(self._options)
  File "/usr/local/google/home/chrishtr/depot_tools/gclient.py", line 921, in RunHooksRecursively
    hook, cwd=self.root.root_dir, always=True)
  File "/usr/local/google/home/chrishtr/depot_tools/gclient_utils.py", line 303, in CheckCallAndFilterAndHeader
    return CheckCallAndFilter(args, **kwargs)
  File "/usr/local/google/home/chrishtr/depot_tools/gclient_utils.py", line 498, in CheckCallAndFilter
    **kwargs)
  File "/usr/local/google/home/chrishtr/depot_tools/subprocess2.py", line 262, in __init__
    % (str(e), kwargs.get('cwd'), args[0]))
OSError: Execution failed with error: [Errno 2] No such file or directory.