Initial cut for a development server

lib/src/codegen/code_generator.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.
 
 library ddc.src.codegen.code_generator;
 
 import 'dart:io';
 
 import 'package:analyzer/src/generated/ast.dart' show CompilationUnit;
 import 'package:analyzer/src/generated/element.dart'
@@ skipping 111 matching lines @@
       return new Uri(path: suffix);
     }
     assert(index == 0);
     return new Uri(
         scheme: 'package', path: path.joinAll(parts.sublist(index + 1)));
   }
 
   CodeGenerator(String outDir, this.root, this.rules)
       : outDir = path.absolute(outDir);
 
-  // TODO(jmesserly): JS generates per library outputs, so it does not use this
-  // method and instead overrides generateLibrary.
-  void generateUnit(CompilationUnit unit, LibraryInfo info, String libraryDir) {
-  }
-
   void generateLibrary(Iterable<CompilationUnit> units, LibraryInfo info,
-      CheckerReporter reporter) {
-    for (var unit in units) {
-      var outputDir = makeOutputDirectory(info, unit);
-      reporter.enterSource(unit.element.source);
-      generateUnit(unit, info, outputDir);
-      reporter.leaveSource();
-    }
-  }
+      CheckerReporter reporter);
 }