Handle timeouts in drt-trampoline on Windows.
Handle timeouts in drt-trampoline on Windows.

This will make timeout of drt tests work on Windows. Killing
dtr-trampoline did not kill DumpRenderTree on Windows.

R=kustermann@google.com,ricow@google.com
BUG=

Review URL: https://codereview.chromium.org//11578003

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@16110 260f80e4-7a28-3924-810f-c04153c831b5

dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk