This should ensure that d3dcompiler_47.dll is saved into an isolate in
chromium, as it's used at runtime.

BUG=611235

Change-Id: I64801f00bf90f2be68c7a691724609bbf4d28dfa
Reviewed-on: https://chromium-review.googlesource.com/344351
Tryjob-Request: John Bauman <jbauman@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: John Bauman <jbauman@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>