Revert "Remove Compiler.assembledCode."

tests/compiler/dart2js/memory_compiler.dart

 // Copyright (c) 2013, 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.test.memory_compiler;
 
 import 'memory_source_file_helper.dart';
 
 import 'package:compiler/src/dart2jslib.dart'
        show NullSink;
 
 import 'package:compiler/compiler.dart'
     show Diagnostic, DiagnosticHandler, CompilerOutputProvider;
 
 import 'dart:async';
 
 import 'package:compiler/src/mirrors/source_mirrors.dart';
 import 'package:compiler/src/mirrors/analyze.dart';
 
 import 'package:compiler/src/library_loader.dart'
     show LoadedLibraries;
 
-export 'output_collector.dart';
-
 class DiagnosticMessage {
   final Uri uri;
   final int begin;
   final int end;
   final String message;
   final Diagnostic kind;
 
   DiagnosticMessage(this.uri, this.begin, this.end, this.message, this.kind);
 
   String toString() => '$uri:$begin:$end:$message:$kind';
@@ skipping 22 matching lines @@
 
   Iterable<DiagnosticMessage> get hints {
     return filterMessagesByKind(Diagnostic.HINT);
   }
 
   Iterable<DiagnosticMessage> get infos {
     return filterMessagesByKind(Diagnostic.INFO);
   }
 }
 
+class BufferedEventSink implements EventSink<String> {
+  StringBuffer sb = new StringBuffer();
+  String text;
+
+  void add(String event) {
+    sb.write(event);
+  }
+
+  void addError(errorEvent, [StackTrace stackTrace]) {
+    // Do not support this.
+  }
+
+  void close() {
+    text = sb.toString();
+    sb = null;
+  }
+}
+
+class OutputCollector {
+  Map<String, Map<String, BufferedEventSink>> outputMap = {};
+
+  EventSink<String> call(String name, String extension) {
+    Map<String, BufferedEventSink> sinkMap =
+        outputMap.putIfAbsent(extension, () => {});
+    return sinkMap.putIfAbsent(name, () => new BufferedEventSink());
+  }
+
+  String getOutput(String name, String extension) {
+    Map<String, BufferedEventSink> sinkMap = outputMap[extension];
+    if (sinkMap == null) return null;
+    BufferedEventSink sink = sinkMap[name];
+    return sink != null ? sink.text : null;
+  }
+}
+
 DiagnosticHandler createDiagnosticHandler(DiagnosticHandler diagnosticHandler,
                                           SourceFileProvider provider,
                                           bool showDiagnostics) {
   var handler = diagnosticHandler;
   if (showDiagnostics) {
     if (diagnosticHandler == null) {
       handler = new FormattingDiagnosticHandler(provider);
     } else {
       var formattingHandler = new FormattingDiagnosticHandler(provider);
       handler = (Uri uri, int begin, int end, String message, Diagnostic kind) {
@@ skipping 124 matching lines @@
 
 class MemoryLoadedLibraries implements LoadedLibraries {
   final Map copiedLibraries;
 
   MemoryLoadedLibraries(this.copiedLibraries);
 
   @override
   bool containsLibrary(Uri uri) => copiedLibraries.containsKey(uri);
 
   @override
-  void forEachImportChain(f, {callback}) {}
+  void forEachImportChain(f) {}
 
   @override
   void forEachLibrary(f) {}
 
   @override
   getLibrary(Uri uri) => copiedLibraries[uri];
 
   @override
   Uri get rootUri => null;
 }
@@ skipping 11 matching lines @@
       createDiagnosticHandler(diagnosticHandler, provider, showDiagnostics);
 
   List<Uri> libraries = <Uri>[];
   memorySourceFiles.forEach((String path, _) {
     libraries.add(new Uri(scheme: 'memory', path: path));
   });
 
   return analyze(libraries, libraryRoot, packageRoot,
                  provider, handler, options);
 }