Code cleanup: moving compiler perf tests to compiler/tool

pkg/compiler/lib/src/dart2js_profile_many.dart

-// Copyright (c) 2014, 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.
-
-library dart2js.profile_many;
-
-import 'dart:async';
-
-import 'dart2js.dart' as cmdline;
-
-const String USAGE = """
-Usage: dart2js_profile_many.dart [OPTIONS] [FILES]
-
-Invokes dart2js separately for each file using the given options.
-This is for profiling multiple compilations in the Dart Observatory.
-""";
-
-printUsage() {
-  print(USAGE);
-}
-
-void main(List<String> args) {
-  List options = [];
-  List files = [];
-
-  for (String arg in args) {
-    if (arg.startsWith('-')) {
-      options.add(arg);
-    } else {
-      files.add(arg);
-    }
-  }
-
-  if (files.length == 0) {
-    printUsage();
-    return;
-  }
-
-  cmdline.exitFunc = (code) {
-    throw "Exit with code $code";
-  };
-
-  Future.forEach(files, (String file) {
-    List subargs = [];
-    subargs.addAll(options);
-    subargs.add(file);
-    return cmdline.compilerMain(subargs).catchError((e) {});
-  }).then((_) {
-    print("Done");
-  });
-}