Update dart2js unit tests to dart_parser and dart_scanner.

pkg/dart2js_incremental/lib/caching_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.
-
-part of dart2js_incremental;
-
-/// Do not call this method directly. It will be made private.
-// TODO(ahe): Make this method private.
-Future<CompilerImpl> reuseCompiler(
-    {CompilerDiagnostics diagnosticHandler,
-     CompilerInput inputProvider,
-     CompilerOutput outputProvider,
-     List<String> options: const [],
-     CompilerImpl cachedCompiler,
-     Uri libraryRoot,
-     Uri packageRoot,
-     Uri packageConfig,
-     bool packagesAreImmutable: false,
-     Map<String, dynamic> environment,
-     Future<bool> reuseLibrary(LibraryElement library)}) {
-  UserTag oldTag = new UserTag('_reuseCompiler').makeCurrent();
-  if (libraryRoot == null) {
-    throw 'Missing libraryRoot';
-  }
-  if (inputProvider == null) {
-    throw 'Missing inputProvider';
-  }
-  if (diagnosticHandler == null) {
-    throw 'Missing diagnosticHandler';
-  }
-  if (outputProvider == null) {
-    outputProvider = const NullCompilerOutput();
-  }
-  if (environment == null) {
-    environment = {};
-  }
-  CompilerImpl compiler = cachedCompiler;
-  JavaScriptBackend backend = compiler?.backend;
-  if (compiler == null ||
-      compiler.libraryRoot != libraryRoot ||
-      !compiler.options.hasIncrementalSupport ||
-      compiler.hasCrashed ||
-      backend.mirrorsAnalysis.resolutionHandler.hasEnqueuedReflectiveElements ||
-      compiler.deferredLoadTask.isProgramSplit) {
-    if (compiler != null && compiler.options.hasIncrementalSupport) {
-      print('***FLUSH***');
-      if (compiler.hasCrashed) {
-        print('Unable to reuse compiler due to crash.');
-      } else if (backend.mirrorsAnalysis.resolutionHandler
-                     .hasEnqueuedReflectiveElements) {
-        print('Unable to reuse compiler due to dart:mirrors.');
-      } else if (compiler.deferredLoadTask.isProgramSplit) {
-        print('Unable to reuse compiler due to deferred loading.');
-      } else {
-        print('Unable to reuse compiler.');
-      }
-    }
-    oldTag.makeCurrent();
-    compiler = new CompilerImpl(
-        inputProvider,
-        outputProvider,
-        diagnosticHandler,
-        new CompilerOptions.parse(
-            libraryRoot: libraryRoot,
-            packageRoot: packageRoot,
-            packageConfig: packageConfig,
-            options: options,
-            environment: environment));
-    backend = compiler.backend;
-
-    Uri core = Uri.parse("dart:core");
-
-    return compiler.setupSdk().then((_) {
-      return compiler.libraryLoader.loadLibrary(core).then((_) {
-        // Likewise, always be prepared for runtimeType support.
-        // TODO(johnniwinther): Add global switch to force RTI.
-        compiler.resolutionWorldBuilder.hasRuntimeTypeSupport = true;
-        compiler.enqueuer.resolution.applyImpact(backend.registerRuntimeType());
-        return compiler;
-      });
-    });
-  } else {
-    compiler.tasks.forEach((t) => t.clearMeasurements());
-    compiler
-        ..userOutputProvider = outputProvider
-        ..provider = inputProvider
-        ..handler = diagnosticHandler
-        ..enqueuer.resolution.queueIsClosed = false
-        ..enqueuer.resolution.hasEnqueuedReflectiveElements = false
-        ..enqueuer.resolution.hasEnqueuedReflectiveStaticFields = false
-        ..enqueuer.codegen.queueIsClosed = false
-        ..enqueuer.codegen.hasEnqueuedReflectiveElements = false
-        ..enqueuer.codegen.hasEnqueuedReflectiveStaticFields = false
-        ..compilationFailed = false;
-    JavaScriptBackend backend = compiler.backend;
-    full.Emitter emitter = backend.emitter.emitter;
-
-    // TODO(ahe): Seems this cache only serves to tell
-    // [emitter.invalidateCaches] if it was invoked on a full compile (in
-    // which case nothing should be invalidated), or if it is an incremental
-    // compilation (in which case, holders/owners of newly compiled methods
-    // must be invalidated).
-    emitter.cachedElements.add(null);
-
-    compiler.enqueuer.codegen
-        ..newlyEnqueuedElements.clear()
-        ..newlySeenSelectors.clear();
-
-    emitter.nsmEmitter
-        ..trivialNsmHandlers.clear();
-
-    backend.emitter.typeTestRegistry
-        ..checkedClasses = null
-        ..checkedFunctionTypes = null
-        ..rtiNeededClasses.clear()
-        ..cachedClassesUsingTypeVariableTests = null;
-
-    emitter.interceptorEmitter
-        ..interceptorInvocationNames.clear();
-
-    backend.emitter.nativeEmitter
-        ..hasNativeClasses = false
-        ..nativeMethods.clear();
-
-    backend.emitter.readTypeVariables.clear();
-
-    emitter
-        ..outputBuffers.clear()
-        ..classesCollector = null
-        ..mangledFieldNames.clear()
-        ..mangledGlobalFieldNames.clear()
-        ..recordedMangledNames.clear()
-        ..clearCspPrecompiledNodes()
-        ..elementDescriptors.clear();
-
-    backend
-        ..preMirrorsMethodCount = 0;
-
-    if (reuseLibrary == null) {
-      reuseLibrary = (LibraryElement library) {
-        return new Future.value(
-            library.isPlatformLibrary ||
-            (packagesAreImmutable && library.isPackageLibrary));
-      };
-    }
-    return compiler.libraryLoader.resetAsync(reuseLibrary).then((_) {
-      oldTag.makeCurrent();
-      return compiler;
-    });
-  }
-}
-
-/// Helper class to collect sources.
-class StringEventSink implements EventSink<String> {
-  List<String> data = <String>[];
-
-  final Function onClose;
-
-  StringEventSink(this.onClose);
-
-  void add(String event) {
-    if (data == null) throw 'StringEventSink is closed.';
-    data.add(event);
-  }
-
-  void addError(errorEvent, [StackTrace stackTrace]) {
-    throw 'addError($errorEvent, $stackTrace)';
-  }
-
-  void close() {
-    if (data != null) {
-      onClose(data.join());
-      data = null;
-    }
-  }
-}
-
-/// Output provider which collect output in [output].
-class OutputProvider implements CompilerOutput {
-  final Map<String, String> output = new Map<String, String>();
-
-  EventSink<String> createEventSink(String name, String extension) {
-    return new StringEventSink((String data) {
-      output['$name.$extension'] = data;
-    });
-  }
-
-  String operator[] (String key) => output[key];
-}