Remove unused API.

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

Index: dart/sdk/lib/_internal/compiler/implementation/use_unused_api.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/use_unused_api.dart b/dart/sdk/lib/_internal/compiler/implementation/use_unused_api.dart
new file mode 100644
index 0000000000000000000000000000000000000000..61fb403b0b5e337581281c8effe1b0185d9466dd
--- /dev/null
+++ b/dart/sdk/lib/_internal/compiler/implementation/use_unused_api.dart
@@ -0,0 +1,181 @@
+// 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 'dart2js.dart' as dart2js;
+
+import 'dart2jslib.dart' as dart2jslib;
+
+import 'tree/tree.dart' as tree;
+
+import 'util/util.dart' as util;
+
+import 'elements/visitor.dart' as elements_visitor;
+
+import 'js/js.dart' as js;
+
+import 'types/concrete_types_inferrer.dart' as concrete_types_inferrer;
+
+import 'colors.dart' as colors;
+
+import 'filenames.dart' as filenames;
+
+import 'dart_types.dart' as dart_types;
+
+import 'universe/universe.dart' as universe;
+
+import 'inferrer/type_graph_inferrer.dart' as type_graph_inferrer;
+
+import 'source_file_provider.dart' as source_file_provider;
+
+import 'ssa/ssa.dart' as ssa;
+
+class ElementVisitor implements elements_visitor.ElementVisitor {
+  visitElement(e) {}
+}
+
+void main(List<String> arguments) {
+  dart2js.main(arguments);
+  useConstant(null, null);
+  useNode(null);
+  useUtil(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);
+  usedByTests();
+}
+
+void useConstant(dart2jslib.Constant 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()
+    ..asModifiers()
+    ..asPart()
+    ..asPartOf()
+    ..asRethrow()
+    ..asStatement()
+    ..asStringInterpolation()
+    ..asStringInterpolationPart()
+    ..asStringJuxtaposition()
+    ..asStringNode()
+    ..asSwitchCase()
+    ..asSwitchStatement()
+    ..asTryStatement()
+    ..asTypeAnnotation()
+    ..asTypeVariable()
+    ..asTypedef()
+    ..asWhile();
+}
+
+void useUtil(util.Link link) {
+  link.reversePrependAll(link);
+  util.trace("");
+}
+
+void useElementVisitor(ElementVisitor visitor) {
+  visitor
+    ..visit(null)
+    ..visitAbstractFieldElement(null)
+    ..visitAmbiguousElement(null)
+    ..visitBoxElement(null)
+    ..visitBoxFieldElement(null)
+    ..visitClassElement(null)
+    ..visitClosureClassElement(null)
+    ..visitClosureFieldElement(null)
+    ..visitCompilationUnitElement(null)
+    ..visitConstructorBodyElement(null)
+    ..visitElement(null)
+    ..visitErroneousElement(null)
+    ..visitFieldParameterElement(null)
+    ..visitFunctionElement(null)
+    ..visitInterceptedElement(null)
+    ..visitLabelElement(null)
+    ..visitLibraryElement(null)
+    ..visitMixinApplicationElement(null)
+    ..visitPrefixElement(null)
+    ..visitScopeContainerElement(null)
+    ..visitTargetElement(null)
+    ..visitThisElement(null)
+    ..visitTypeDeclarationElement(null)
+    ..visitTypeVariableElement(null)
+    ..visitTypedefElement(null)
+    ..visitVariableElement(null)
+    ..visitVariableListElement(null)
+    ..visitVoidElement(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();
+}
+
+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;
+  type_graph_inferrer.TypeGraphInferrer typeGraphInferrer = null;
+  source_file_provider.SourceFileProvider sourceFileProvider = null;
+  world.hasAnyUserDefinedGetter(null);
+  compiler.importHelperLibrary(null);
+  typeGraphInferrer.getCallersOf(null);
+  dart_types.Types.sorted(null);
+  new universe.TypedSelector.subclass(null, null);
+  new universe.TypedSelector.subtype(null, null);
+  new universe.TypedSelector.exact(null, null);
+  sourceFileProvider.readStringFromUri(null);
+}