Paths containing ':' characters are illegal only on Windows platforms.
So, ssh_url like git@github.com:chromium/chromium.git will generate
runtime exception on Windows. We replace ':' with '__' to avoid
exceptions in the ssh form of git_url case.
R=ddoman@chromium.org
Bug: 329781388
Change-Id: Ia4db6a0927b40b521477e5d90addb4056c2c8ef8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5369296
Auto-Submit: 吴金立 <wujinli.cn@gmail.com>
Reviewed-by: Aravind Vasudevan <aravindvasudev@google.com>
Commit-Queue: Joanna Wang <jojwang@chromium.org>
