Move frog/leg to lib/compiler/implementation.

frog/leg/api.dart

-// Copyright (c) 2012, 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('leg_api');
-
-#import('../../lib/uri/uri.dart');
-#import('apiimpl.dart');
-
-// Unless explicitly allowed, passing null for any argument to the
-// methods of library will result in a NullPointerException being
-// thrown.
-
-/**
- * Returns the source corresponding to [uri]. If no such source exists
- * or if an error occur while fetching it, this method must throw an
- * exception.
- */
-typedef Future<String> ReadUriFromString(Uri uri);
-
-/**
- * Invoked by the compiler to report diagnostics. If [uri] is null, so
- * is [begin] and [end]. No other arguments may be null. If [uri] is
- * not null, neither are [begin] and [end]. [uri] indicates the
- * compilation unit from where the diagnostic originates. [begin] and
- * [end] are zero-based character offsets from the beginning of the
- * compilaton unit. [message] is the diagnostic message, and [fatal]
- * indicates whether or not this diagnostic will prevent the compiler
- * from returning null.
- */
-typedef void DiagnosticHandler(Uri uri, int begin, int end,
-                               String message, bool fatal);
-
-/**
- * Returns [script] compiled to JavaScript. If the compilation fails,
- * null is returned and [handler] will have been invoked at least once
- * with [:fatal == true:].
- */
-Future<String> compile(Uri script,
-                       Uri libraryRoot,
-                       ReadUriFromString provider,
-                       DiagnosticHandler handler,
-                       [List<String> options = const []]) {
-  Compiler compiler = new Compiler(provider, handler, libraryRoot, options);
-  compiler.run(script);
-  String code = compiler.assembledCode;
-  Completer<String> completer = new Completer<String>();
-  completer.complete(code);
-  return completer.future;
-}