Revert 238876 "Roll DEPS to get cros chrome-sdk support for exte..."

I suspect this broke chromiumos builders, e.g. http://build.chromium.org/p/chromium.chromiumos/builders/ChromiumOS%20%28x86%29/builds/18380

deploy_chrome crashes.

> Roll DEPS to get cros chrome-sdk support for external boards.
> 
> BUG=chromium:236500
> TEST=Try building Chrome with --board=x86-generic
> 
> Review URL: https://codereview.chromium.org/99473003

TBR=davidjames@chromium.org

Review URL: https://codereview.chromium.org/104373004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238925 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238926 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238926