Moves code collection test to io

tests/standalone/code_collection_test.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// Dart test program testing code GC.
-
-import "package:expect/expect.dart";
-import "dart:async";
-import "dart:io";
-
-
-int foo(int x) {
-  x = x + 1;
-  return x;
-}
-
-
-List<int> bar() {
-  // A couple of big allocations trigger GC.
-  var l = new List.filled(700000, 7);
-  return l;
-}
-
-
-doTest() {
- var i = 0;
-  foo(1);  // Initial call to compile.
-  // Time passes, GC runs, foo's code is dropped.
-  var ms = const Duration(milliseconds: 100);
-  var t = new Timer.periodic(ms, (timer) {
-    i++;
-    bar();
-    if (i > 1) {
-      timer.cancel();
-      // foo is called again to make sure we can still run it even after
-      // its code has been detached.
-      foo(2);
-    }
-  });
-}
-
-
-main() {
-  var opts = new Options();
-  if (opts.arguments.contains("--run")) {
-    doTest();
-  } else {
-    // Run the test and capture stdout.
-    var pr = Process.runSync(Platform.executable,
-        ["--collect-code",
-         "--code-collection-interval-in-us=100000",
-         "--log-code-drop",
-         "--optimization-counter-threshold=-1",
-         "--package-root=${Platform.packageRoot}",
-         Platform.script,
-         "--run"]);
-
-    // Code drops are logged with --log-code-drop. Look through stdout for the
-    // message that foo's code was dropped.
-    var found = false;
-    pr.stdout.split("\n").forEach((line) {
-      if (line.contains("Detaching code") && line.contains("foo")) {
-        found = true;
-      }
-    });
-    Expect.isTrue(found);
-  }
-}