Allow Suites to be added to an Engine over time.

lib/src/runner/browser/compiler_pool.dart

Index: lib/src/runner/browser/compiler_pool.dart
diff --git a/lib/src/runner/browser/compiler_pool.dart b/lib/src/runner/browser/compiler_pool.dart
index fae1fc5f304d56477c21dfc7dbf12d29f61759a8..20f555bcf4013420e974941667cddcef3f046876 100644
--- a/lib/src/runner/browser/compiler_pool.dart
+++ b/lib/src/runner/browser/compiler_pool.dart
@@ -111,9 +111,9 @@ void main(_) {
         // ensure that we're done printing everything about one process before
         // we start the next.
         await Future.wait([
-          santizeForWindows(compiler.process.stdout).listen(stdout.add)
+          sanitizeForWindows(compiler.process.stdout).listen(stdout.add)
               .asFuture(),
-          santizeForWindows(compiler.process.stderr).listen(stderr.add)
+          sanitizeForWindows(compiler.process.stderr).listen(stderr.add)
               .asFuture(),
           compiler.process.exitCode.then((exitCode) {
             if (exitCode == 0 || _closed) return;