Add support for finding depot_tools' MSVC toolchain on the bots.

- Pull in a trimmed down version of from Chromium.

- Drop in toolchain_vs2013.hash from Chromium to use Chromium's
  current toolchain.

- Add a very hacky to pull in Visual Studio. This is
  loosely based off a handful of lines of Chromium's
  tools/clang/scripts/ This (and depends
  on gyp which is now pulled in via DEPS.


Change-Id: Ic29cbb15e19a99616cfe778d0778b9a71c45338a
Reviewed-by: Adam Langley <>
4 files changed