Move all main methods to tool/.

pkg/front_end/lib/src/fasta/outline.dart

 // Copyright (c) 2016, 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 fasta.outline;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show exitCode;
 
 import 'kernel/verifier.dart' show verifyProgram;
 
 import 'compiler_command_line.dart' show CompilerCommandLine;
 
 import 'compiler_context.dart' show CompilerContext;
 
 import 'errors.dart' show InputError, inputError;
 
 import 'kernel/kernel_target.dart' show KernelTarget;
 
 import 'dill/dill_target.dart' show DillTarget;
 
 import 'ticker.dart' show Ticker;
 
 import 'translate_uri.dart' show TranslateUri;
 
+const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);
+
+compileEntryPoint(List<String> arguments) async {
+  for (int i = 0; i < iterations; i++) {
+    if (i > 0) {
+      print("\n");
+    }
+    await compile(arguments);
+  }
+}
+
+outlineEntryPoint(List<String> arguments) async {
+  for (int i = 0; i < iterations; i++) {
+    if (i > 0) {
+      print("\n");
+    }
+    await outline(arguments);
+  }
+}
+
 Future<KernelTarget> outline(List<String> arguments) async {
   try {
     return await CompilerCommandLine.withGlobalOptions("outline", arguments,
         (CompilerContext c) async {
       if (c.options.verbose) {
         print("Building outlines for ${arguments.join(' ')}");
       }
       CompileTask task =
           new CompileTask(c, new Ticker(isVerbose: c.options.verbose));
       return await task.buildOutline(c.options.output);
@@ skipping 75 matching lines @@
         exitCode = 1;
         print("Verification of program failed: $e");
         if (s != null && c.options.verbose) {
           print(s);
         }
       }
     }
     return uri;
   }
 }