The local function test() in testQueryParameters() expects its map to
have type Map<String, String>. Most of the time this happens
automatically by type inference, but when we create the map using `var
map = new Map()` we need to specify the type arguments explicitly.
Change-Id: I2c6c868af776c3fbd25d862ac8a5bfb9147715dc
Reviewed-on: https://dart-review.googlesource.com/19454
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Bob Nystrom <rnystrom@google.com>