Use Directory.systemTemp getter in pkg subdirectory of repository.

BUG=
R=sgjesse@google.com

Review URL: https://codereview.chromium.org//25731003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/http@28218 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: c0f793e296684272ddb2082b18ff1dc07f204665
  1. lib/
  2. test/
  3. pubspec.yaml