Revert "Add support for 'dart.library.X' environment variables in dart2js."

tests/compiler/dart2js/library_env_test.dart

-// Copyright (c) 2015, 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 'dart:' libraries have their corresponding dart.library.X
-/// environment variable set.
-
-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/null_compiler_output.dart' show
-    NullCompilerOutput;
-
-import 'package:compiler/compiler_new.dart' show
-    CompilerInput,
-    CompilerDiagnostics;
-
-import 'package:sdk_library_metadata/libraries.dart' show
-    DART2JS_PLATFORM,
-    LibraryInfo;
-
-const LibraryInfo mock1LibraryInfo = const LibraryInfo(
-    "mock1.dart",
-    category: "Client",
-    documented: false,
-    platforms: DART2JS_PLATFORM);
-
-const LibraryInfo mock2LibraryInfo = const LibraryInfo(
-    "mock2.dart",
-    category: "Server",
-    documented: false,
-    platforms: DART2JS_PLATFORM);
-
-const LibraryInfo mock3LibraryInfo = const LibraryInfo(
-    "mock3.dart",
-    category: "Shared",
-    documented: false,
-    platforms: DART2JS_PLATFORM);
-
-class DummyCompilerInput implements CompilerInput {
-  const DummyCompilerInput();
-
-  readFromUri(uri) {
-    throw "should not be needed";
-  }
-}
-
-class DummyCompilerDiagnostics implements CompilerDiagnostics {
-  const DummyCompilerDiagnostics();
-
-  report(code, uri, begin, end, text, kind) {
-    throw "should not be needed";
-  }
-}
-
-class CustomCompiler extends Compiler {
-  CustomCompiler(
-      options,
-      environment)
-      : super(
-          const DummyCompilerInput(),
-          const NullCompilerOutput(),
-          const DummyCompilerDiagnostics(),
-          Uri.base.resolve("sdk/"),
-          null,
-          options,
-          environment);
-
-  LibraryInfo lookupLibraryInfo(String name) {
-    if (name == "mock.client") return mock1LibraryInfo;
-    if (name == "mock.server") return mock2LibraryInfo;
-    if (name == "mock.shared") return mock3LibraryInfo;
-    return super.lookupLibraryInfo(name);
-  }
-}
-
-main() {
-  Compiler compiler = new CustomCompiler(
-      [],
-      {});
-
-  // Core libraries are always present.
-  Expect.equals("true", compiler.fromEnvironment("dart.library.collection"));
-  // Non-existing entries in the environment return 'null'.
-  Expect.isNull(compiler.fromEnvironment("not in env"));
-  // Check for client libraries (default if there are no flags to the compiler).
-  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.client"));
-  Expect.equals("true", compiler.fromEnvironment("dart.library.html"));
-  // Check for shared libraries..
-  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.shared"));
-  // Check server libraries are not present.
-  Expect.equals(null, compiler.fromEnvironment("dart.library.mock.server"));
-  Expect.equals(null, compiler.fromEnvironment("dart.library.io"));
-
-  compiler = new CustomCompiler(
-      ['--categories=Server'],
-      {});
-
-  // Core libraries are always present.
-  Expect.equals("true", compiler.fromEnvironment("dart.library.collection"));
-  // Non-existing entries in the environment return 'null'.
-  Expect.isNull(compiler.fromEnvironment("not in env"));
-  // Check client libraries are not present.
-  Expect.equals(null, compiler.fromEnvironment("dart.library.mock.client"));
-  Expect.equals(null, compiler.fromEnvironment("dart.library.html"));
-  // Check for shared libraries..
-  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.shared"));
-  // Check for server libraries.
-  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.server"));
-  Expect.equals("true", compiler.fromEnvironment("dart.library.io"));
-
-  // Check that user-defined env-variables win.
-  compiler = new CustomCompiler(
-      [],
-      {'dart.library.collection': "false",
-       'dart.library.mock.client': "foo"});
-  Expect.equals("false", compiler.fromEnvironment("dart.library.collection"));
-  Expect.equals("foo", compiler.fromEnvironment("dart.library.mock.client"));
-}