Add interfaces for a new compiler API.

tests/compiler/dart2js/library_resolution_test.dart

 // Copyright (c) 2014, 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.
 
 /// Check that relative URIs are resolved against the canonical name of a
 /// library. This only matters for dart:-libraries, so this test mocks up two
 /// dart:-libraries.
 
 import "dart:io";
 
 import "dart:async";
 
 import "memory_source_file_helper.dart";
 
 import "package:async_helper/async_helper.dart";
 
 import 'package:expect/expect.dart' show
     Expect;
 
 import 'package:compiler/src/elements/elements.dart' show
     LibraryElement;
 
 import 'package:compiler/src/dart2jslib.dart' show
-    MessageKind,
-    NullSink;
+    MessageKind;
+
+import 'package:compiler/src/null_compiler_output.dart' show
+    NullCompilerOutput;
+
+import 'package:compiler/src/old_to_new_api.dart' show
+    LegacyCompilerDiagnostics,
+    LegacyCompilerInput;
 
 import 'package:sdk_library_metadata/libraries.dart' show
     DART2JS_PLATFORM,
     LibraryInfo;
 
 const LibraryInfo mock1LibraryInfo = const LibraryInfo(
     "mock1.dart",
     category: "Shared",
     documented: false,
     platforms: DART2JS_PLATFORM);
 
 const LibraryInfo mock2LibraryInfo = const LibraryInfo(
     "mock2.dart",
     category: "Shared",
     documented: false,
     platforms: DART2JS_PLATFORM);
 
+
 class CustomCompiler extends Compiler {
   final Map<String, LibraryInfo> customLibraryInfo;
 
   CustomCompiler(
       this.customLibraryInfo,
       provider,
-      outputProvider,
       handler,
       libraryRoot,
       packageRoot,
       options,
       environment)
       : super(
           provider,
-          outputProvider,
+          const NullCompilerOutput(),
           handler,
           libraryRoot,
           packageRoot,
           options,
           environment);
 
   LibraryInfo lookupLibraryInfo(String name) {
     if (name == "m_o_c_k_1") return mock1LibraryInfo;
     if (name == "m_o_c_k_2") return mock2LibraryInfo;
     return super.lookupLibraryInfo(name);
   }
 }
 
 main() {
   Uri sdkRoot = Uri.base.resolve("sdk/");
   Uri packageRoot = Uri.base.resolve(Platform.packageRoot);
 
   var provider = new MemorySourceFileProvider(MEMORY_SOURCE_FILES);
   var handler = new FormattingDiagnosticHandler(provider);
 
-  outputProvider(String name, String extension) {
-    if (name != '') throw 'Attempt to output file "$name.$extension"';
-    return new NullSink('$name.$extension');
-  }
-
   Future wrappedProvider(Uri uri) {
     if (uri == sdkRoot.resolve('lib/mock1.dart')) {
       return provider.readStringFromUri(Uri.parse('memory:mock1.dart'));
     }
     if (uri == sdkRoot.resolve('lib/mock2.dart')) {
       return provider.readStringFromUri(Uri.parse('memory:mock2.dart'));
     }
     return provider.readStringFromUri(uri);
   }
 
@@ skipping 11 matching lines @@
       return handler(uri, begin, end, message, kind);
     }
   }
 
   checkLibrary(LibraryElement library) {
     Expect.equals(1, actualMessageCount);
   }
 
   Compiler compiler = new CustomCompiler(
       {},
-      wrappedProvider,
-      outputProvider,
-      wrappedHandler,
+      new LegacyCompilerInput(wrappedProvider),
+      new LegacyCompilerDiagnostics(wrappedHandler),
       sdkRoot,
       packageRoot,
       [],
       {});
 
   asyncStart();
   compiler.libraryLoader.loadLibrary(Uri.parse("dart:m_o_c_k_1"))
       .then(checkLibrary)
       .then(asyncSuccess);
 }
 
 const Map MEMORY_SOURCE_FILES = const {
   "mock1.dart": "library mock1; import 'mock2.dart';",
   "mock2.dart": "library mock2;",
 };