Move some of analyzer's code generation utilities into front_end.

pkg/analyzer/tool/summary/generate.dart

 // Copyright (c) 2015, 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.
 
 /**
  * This file contains code to generate serialization/deserialization logic for
  * summaries based on an "IDL" description of the summary format (written in
  * stylized Dart).
  *
  * For each class in the "IDL" input, two corresponding classes are generated:
  * - A class with the same name which represents deserialized summary data in
  *   memory.  This class has read-only semantics.
  * - A "builder" class which can be used to generate serialized summary data.
  *   This class has write-only semantics.
  *
  * Each of the "builder" classes has a single `finish` method which writes
  * the entity being built into the given FlatBuffer and returns the `Offset`
  * reference to it.
  */
 library analyzer.tool.summary.generate;
 
 import 'dart:convert';
-import 'dart:io' hide File;
+import 'dart:io';
 
-import 'package:analyzer/file_system/file_system.dart';
-import 'package:analyzer/file_system/physical_file_system.dart';
-import 'package:analyzer/src/codegen/tools.dart';
+import 'package:front_end/src/codegen/tools.dart';
 import 'package:front_end/src/fasta/scanner/string_scanner.dart';
 import 'package:front_end/src/fasta/scanner/token.dart';
 import 'package:path/path.dart';
 
 import 'idl_model.dart' as idlModel;
 import 'mini_ast.dart';
 
 main() {
   String script = Platform.script.toFilePath(windows: Platform.isWindows);
   String pkgPath = normalize(join(dirname(script), '..', '..'));
@@ skipping 35 matching lines @@
    */
   String _indentation = '';
 
   /**
    * Semantic model of the "IDL" input file.
    */
   idlModel.Idl _idl;
 
   _CodeGenerator(String pkgPath) {
     // Parse the input "IDL" file.
-    PhysicalResourceProvider provider = new PhysicalResourceProvider(
-        PhysicalResourceProvider.NORMALIZE_EOL_ALWAYS);
     String idlPath = join(pkgPath, 'lib', 'src', 'summary', 'idl.dart');
-    File idlFile = provider.getFile(idlPath);
-    String idlText = idlFile.readAsStringSync();
+    File idlFile = new File(idlPath);
+    String idlText =
+        idlFile.readAsStringSync().replaceAll(new RegExp('\r\n?'), '\n');
     // Extract a description of the IDL and make sure it is valid.
     var scanner = new StringScanner(idlText, includeComments: true);
     var startingToken = scanner.tokenize();
     var listener = new MiniAstBuilder();
     var parser = new MiniAstParser(listener);
     parser.parseUnit(startingToken);
     extractIdl(listener.compilationUnit);
     checkIdl();
   }
 
@@ skipping 910 matching lines @@
       Token token = comment.tokens.first;
       return token.lexeme.split('\n').map((String line) {
         line = line.trimLeft();
         if (line.startsWith('*')) line = ' ' + line;
         return line;
       }).join('\n');
     }
     return null;
   }
 }