Introduce the "Embedded" category.

tests/compiler/dart2js/embedded_category_api_boundary_test.dart

Index: tests/compiler/dart2js/embedded_category_api_boundary_test.dart
diff --git a/tests/compiler/dart2js/embedded_category_api_boundary_test.dart b/tests/compiler/dart2js/embedded_category_api_boundary_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..cbd973e2a499b57f0c6bf2a42c89fc0e7348cc0d
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+++ b/tests/compiler/dart2js/embedded_category_api_boundary_test.dart
@@ -0,0 +1,48 @@
+// Copyright (c) 2015, the Fletch 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.md file.
+
+/// Tests that analyzing everything from the libraries that are public from the
+/// embedded category does not cause elements from other libraries to be
+/// processed.
+library embedded_category_boundary_test;
+
+import 'package:expect/expect.dart';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/compiler.dart';
+import 'package:compiler/src/elements/elements.dart';
+import 'package:sdk_library_metadata/libraries.dart';
+
+import 'analyze_helper.dart';
+
+main() async {
+  List<Uri> uriList = new List<Uri>();
+  libraries.forEach((String name, LibraryInfo info) {
+    if (info.categories.contains(Category.embedded)) {
+      uriList.add(new Uri(scheme: 'dart', path: name));
+    }
+  });
+  asyncTest(() async {
+    analyze(uriList, {},
+        checkResults: checkResults, analyzeMain: true, analyzeAll: false);
+  });
+}
+
+/// These elements are currently escaping from dart:async via
+/// `core._Resource#_readAsStream`.
+Set<String> whiteList = new Set.from([
+  "function(StreamController#addError)",
+  "getter(StreamController#stream)",
+  "setter(StreamController#onListen)"
+]);
+
+bool checkResults(Compiler compiler, CollectingDiagnosticHandler handler) {
+  return compiler.enqueuer.resolution.processedElements
+      .every((Element element) {
+    if (whiteList.contains("$element")) return true;
+    LibraryInfo info = libraries[element.library.canonicalUri.path];
+    bool isAllowedInEmbedded =
+        info.isInternal || info.categories.contains(Category.embedded);
+    return isAllowedInEmbedded;
+  });
+}