Remove old dart2js code.

sdk/lib/_internal/compiler/implementation/use_unused_api.dart

-// Copyright (c) 2012, 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 use methods that aren't used by dart2js.dart, but that we wish to
-/// keep anyway. This might be general API that isn't currently in use,
-/// debugging aids, or API only used for testing (see TODO below).
-
-library dart2js.use_unused_api;
-
-import '../compiler.dart' as api;
-
-import 'colors.dart' as colors;
-import 'constants/values.dart' as constants;
-import 'cps_ir/cps_ir_builder.dart' as ir_builder;
-import 'cps_ir/cps_ir_nodes_sexpr.dart' as cps_ir_nodes_sexpr;
-import 'dart_types.dart' as dart_types;
-import 'dart2js.dart' as dart2js;
-import 'dart2jslib.dart' as dart2jslib;
-import 'elements/elements.dart' as elements;
-import 'elements/modelx.dart' as modelx;
-import 'elements/visitor.dart' as elements_visitor;
-import 'filenames.dart' as filenames;
-import 'inferrer/concrete_types_inferrer.dart' as concrete_types_inferrer;
-import 'inferrer/type_graph_inferrer.dart' as type_graph_inferrer;
-import 'js/js.dart' as js;
-import 'js_emitter/js_emitter.dart' as js_emitter;
-import 'source_file_provider.dart' as source_file_provider;
-import 'ssa/ssa.dart' as ssa;
-import 'tree/tree.dart' as tree;
-import 'universe/universe.dart' as universe;
-import 'util/util.dart' as util;
-
-class ElementVisitor extends elements_visitor.ElementVisitor {
-  visitElement(e) {}
-}
-
-void main(List<String> arguments) {
-  useApi();
-  dart2js.main(arguments);
-  useConstant(null, null);
-  useNode(null);
-  useUtil(null);
-  useSetlet(null);
-  useImmutableEmptySet(null);
-  useElementVisitor(new ElementVisitor());
-  useJs(new js.Program(null));
-  useJs(new js.Blob(null));
-  useJs(new js.NamedFunction(null, null));
-  useConcreteTypesInferrer(null);
-  useColor();
-  useFilenames();
-  useSsa(null);
-  useCodeBuffer(null);
-  usedByTests();
-  useElements(null, null, null);
-  useIr(null, null, null);
-  useCompiler(null);
-  useTypes();
-  useCodeEmitterTask(null);
-}
-
-useApi() {
-  api.ReadStringFromUri uri;
-}
-
-void useConstant(constants.ConstantValue constant,
-                 dart2jslib.ConstantSystem cs) {
-  constant.isObject;
-  cs.isBool(constant);
-}
-
-void useNode(tree.Node node) {
-  node
-    ..asBreakStatement()
-    ..asCascade()
-    ..asCatchBlock()
-    ..asClassNode()
-    ..asCombinator()
-    ..asConditional()
-    ..asContinueStatement()
-    ..asErrorExpression()
-    ..asExport()
-    ..asFor()
-    ..asFunctionDeclaration()
-    ..asIf()
-    ..asLabeledStatement()
-    ..asLibraryDependency()
-    ..asLibraryName()
-    ..asLiteralDouble()
-    ..asLiteralList()
-    ..asLiteralMap()
-    ..asLiteralMapEntry()
-    ..asLiteralNull()
-    ..asLiteralSymbol()
-    ..asMetadata()
-    ..asModifiers()
-    ..asPart()
-    ..asPartOf()
-    ..asRethrow()
-    ..asReturn()
-    ..asStatement()
-    ..asStringInterpolation()
-    ..asStringInterpolationPart()
-    ..asStringJuxtaposition()
-    ..asStringNode()
-    ..asSwitchCase()
-    ..asSwitchStatement()
-    ..asTryStatement()
-    ..asTypeAnnotation()
-    ..asTypeVariable()
-    ..asTypedef()
-    ..asWhile();
-}
-
-void useUtil(util.Link link) {
-  link.reversePrependAll(link);
-  util.longestCommonPrefixLength(null, null);
-  new util.Pair(null, null);
-}
-
-void useSetlet(util.Setlet setlet) {
-  setlet.difference(setlet);
-  setlet.retainWhere(null);
-}
-
-void useImmutableEmptySet(util.ImmutableEmptySet set) {
-  set.retainWhere(null);
-}
-
-void useElementVisitor(ElementVisitor visitor) {
-  visitor
-    ..visit(null)
-    ..visitAbstractFieldElement(null)
-    ..visitAmbiguousElement(null)
-    ..visitBoxFieldElement(null)
-    ..visitClassElement(null)
-    ..visitClosureClassElement(null)
-    ..visitClosureFieldElement(null)
-    ..visitCompilationUnitElement(null)
-    ..visitConstructorBodyElement(null)
-    ..visitElement(null)
-    ..visitErroneousElement(null)
-    ..visitFieldParameterElement(null)
-    ..visitFunctionElement(null)
-    ..visitLibraryElement(null)
-    ..visitMixinApplicationElement(null)
-    ..visitPrefixElement(null)
-    ..visitScopeContainerElement(null)
-    ..visitTypeDeclarationElement(null)
-    ..visitTypeVariableElement(null)
-    ..visitTypedefElement(null)
-    ..visitVariableElement(null)
-    ..visitWarnOnUseElement(null);
-}
-
-useJs(js.Node node) {
-  node.asVariableUse();
-}
-
-useConcreteTypesInferrer(concrete_types_inferrer.ConcreteTypesInferrer c) {
-  c.debug();
-}
-
-useColor() {
-  colors.white(null);
-  colors.blue(null);
-  colors.yellow(null);
-  colors.black(null);
-}
-
-useFilenames() {
-  filenames.appendSlash(null);
-}
-
-useSsa(ssa.HInstruction instruction) {
-  instruction.isConstantNumber();
-  new ssa.HAndOrBlockInformation(null, null, null);
-  new ssa.HStatementSequenceInformation(null);
-}
-
-useCodeBuffer(dart2jslib.CodeBuffer buffer) {
-  buffer.writeln();
-}
-
-usedByTests() {
-  // TODO(ahe): We should try to avoid including API used only for tests. In
-  // most cases, such API can be moved to a test library.
-  dart2jslib.World world = null;
-  dart2jslib.Compiler compiler = null;
-  compiler.currentlyInUserCode();
-  type_graph_inferrer.TypeGraphInferrer typeGraphInferrer = null;
-  source_file_provider.SourceFileProvider sourceFileProvider = null;
-  world.hasAnyUserDefinedGetter(null);
-  typeGraphInferrer.getCallersOf(null);
-  dart_types.Types.sorted(null);
-  new dart_types.Types(compiler).copy(compiler);
-  new universe.TypedSelector.subclass(null, null, compiler.world);
-  new universe.TypedSelector.subtype(null, null, compiler.world);
-  new universe.TypedSelector.exact(null, null, compiler.world);
-  sourceFileProvider.readStringFromUri(null);
-}
-
-useElements(elements.ClassElement e, elements.Name n, modelx.FieldElementX f) {
-  e.lookupClassMember(null);
-  e.lookupInterfaceMember(null);
-  n.isAccessibleFrom(null);
-  f.reuseElement();
-}
-
-useIr(cps_ir_nodes_sexpr.SExpressionStringifier stringifier,
-      ir_builder.IrBuilderTask task,
-      ir_builder.IrBuilder builder) {
-  new cps_ir_nodes_sexpr.SExpressionStringifier();
-  stringifier
-    ..newContinuationName()
-    ..newValueName()
-    ..visitConstant(null)
-    ..visitContinuation(null)
-    ..visitDefinition(null)
-    ..visitExpression(null)
-    ..visitFunctionDefinition(null)
-    ..visitInvokeStatic(null)
-    ..visitLetCont(null)
-    ..visitNode(null)
-    ..visitParameter(null);
-  task
-    ..hasIr(null)
-    ..getIr(null);
-  builder
-    ..buildIntegerLiteral(null)
-    ..buildDoubleLiteral(null)
-    ..buildBooleanLiteral(null)
-    ..buildNullLiteral()
-    ..buildStringLiteral(null)
-    ..buildDynamicGet(null, null);
-}
-
-useCompiler(dart2jslib.Compiler compiler) {
-  compiler.libraryLoader
-      ..reset()
-      ..resetAsync(null)
-      ..lookupLibrary(null);
-  compiler.forgetElement(null);
-}
-
-useTypes() {
-  new dart_types.ResolvedTypedefType(null, null, null).unalias(null);
-}
-
-useCodeEmitterTask(js_emitter.CodeEmitterTask codeEmitterTask) {
-  codeEmitterTask.oldEmitter.clearCspPrecompiledNodes();
-}