Remove now unnecessary msvs_cygwin_shell:1

Was necessary for VS build, but no longer required.

BUG=123026
TBR=jam@chromium.org
TEST=remove out\Debug\d3dcompiler_43.dll and ninja -C out\Debug D3DCompiler_43.dll

Review URL: https://codereview.chromium.org/142323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245778 0039d316-1c4b-4281-b951-d872f2087c98
Blink roll 165362:165364

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=165363:165364&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/142353002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245779 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245780 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245780