Allow Suites to be added to an Engine over time.

lib/src/runner/browser/content_shell.dart

Index: lib/src/runner/browser/content_shell.dart
diff --git a/lib/src/runner/browser/content_shell.dart b/lib/src/runner/browser/content_shell.dart
index 71a5a2506e9bcd7f9252905759d85e80e578c637..917491f63cdf9541c2c7d595017509f39264ac33 100644
--- a/lib/src/runner/browser/content_shell.dart
+++ b/lib/src/runner/browser/content_shell.dart
@@ -8,12 +8,10 @@ import 'dart:async';
 import 'dart:convert';

[kevmoo, 2015/06/17 22:20:04]

unused import

[nweiz, 2015/06/17 22:41:08]

Done.

 import 'dart:io';
 
+import '../../utils.dart';
 import '../application_exception.dart';
 import 'browser.dart';
 
-/// A converter that transforms a byte stream into a stream of lines.
-final _lines = UTF8.decoder.fuse(const LineSplitter());
-
 /// A class for running an instance of the Dartium content shell.
 ///
 /// Most of the communication with the browser is expected to happen via HTTP,
@@ -39,7 +37,7 @@ class ContentShell extends Browser {
         executable, ["--dump-render-tree", url.toString()],
         environment: {"DART_FLAGS": "--checked"});
 
-    _lines.bind(process.stderr).listen((line) {
+    lineSplitter.bind(process.stderr).listen((line) {
       if (line != "[dartToStderr]: Dartium build has expired") return;
 
       // TODO(nweiz): link to dartlang.org once it has download links for