Big merge from experimental to bleeding edge.

sdk/lib/_internal/compiler/implementation/native_handler.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.
 
 library native;
 
 import 'dart:uri';
 import 'dart2jslib.dart' hide SourceString;
 import 'elements/elements.dart';
 import 'js_backend/js_backend.dart';
@@ skipping 15 matching lines @@
   /// The specific implementation of List that is JavaScript Array:
   static const JsArray = const SpecialType._('=List');
 }
 
 
 /**
  * This could be an abstract class but we use it as a stub for the dart_backend.
  */
 class NativeEnqueuer {
   /// Initial entry point to native enqueuer.
-  void processNativeClasses(Collection<LibraryElement> libraries) {}
+  void processNativeClasses(Iterable<LibraryElement> libraries) {}
 
   /// Notification of a main Enqueuer worklist element.  For methods, adds
   /// information from metadata attributes, and computes types instantiated due
   /// to calling the method.
   void registerElement(Element element) {}
 
   /// Notification of native field.  Adds information from metadata attributes.
   void handleFieldAnnotations(Element field) {}
 
   /// Computes types instantiated due to getting a native field.
@@ skipping 47 matching lines @@
   final Compiler compiler;
   final bool enableLiveTypeAnalysis;
 
   ClassElement _annotationCreatesClass;
   ClassElement _annotationReturnsClass;
   ClassElement _annotationJsNameClass;
 
   /// Subclasses of [NativeEnqueuerBase] are constructed by the backend.
   NativeEnqueuerBase(this.world, this.compiler, this.enableLiveTypeAnalysis);
 
-  void processNativeClasses(Collection<LibraryElement> libraries) {
+  void processNativeClasses(Iterable<LibraryElement> libraries) {
     libraries.forEach(processNativeClassesInLibrary);
     processNativeClassesInLibrary(compiler.isolateHelperLibrary);
     if (!enableLiveTypeAnalysis) {
       nativeClasses.forEach((c) => enqueueClass(c, 'forced'));
       flushQueue();
     }
   }
 
   void processNativeClassesInLibrary(LibraryElement library) {
     // Use implementation to ensure the inclusion of injected members.
@@ skipping 228 matching lines @@
     // Give an info so that library developers can compile with -v to find why
     // all the native classes are included.
     if (unusedClasses.isEmpty && !allUsedBefore) {
       compiler.log('All native types marked as used due to $cause.');
     }
   }
 
   enqueueUnusedClassesMatching(bool predicate(classElement),
                                cause,
                                [String reason]) {
-    Collection matches = unusedClasses.filter(predicate);
+    Iterable matches = unusedClasses.where(predicate);
     matches.forEach((c) => enqueueClass(c, cause));
   }
 
   onFirstNativeClass() {
     staticUse(name) => world.registerStaticUse(compiler.findHelper(name));
 
     staticUse(const SourceString('dynamicFunction'));
     staticUse(const SourceString('dynamicSetMetadata'));
     staticUse(const SourceString('defineProperty'));
     staticUse(const SourceString('toStringForNativeObject'));
@@ skipping 29 matching lines @@
 
 class NativeCodegenEnqueuer extends NativeEnqueuerBase {
 
   final CodeEmitterTask emitter;
 
   final Set<ClassElement> doneAddSubtypes = new Set<ClassElement>();
 
   NativeCodegenEnqueuer(Enqueuer world, Compiler compiler, this.emitter)
     : super(world, compiler, compiler.enableNativeLiveTypeAnalysis);
 
-  void processNativeClasses(Collection<LibraryElement> libraries) {
+  void processNativeClasses(Iterable<LibraryElement> libraries) {
     super.processNativeClasses(libraries);
 
     // HACK HACK - add all the resolved classes.
     NativeEnqueuerBase enqueuer = compiler.enqueuer.resolution.nativeEnqueuer;
     for (final classElement in enqueuer.registeredClasses) {
       if (unusedClasses.contains(classElement)) {
         enqueueClass(classElement, 'was resolved');
       }
     }
     flushQueue();
@@ skipping 33 matching lines @@
         '${unusedClasses.length} native classes omitted.');
   }
 }
 
 void maybeEnableNative(Compiler compiler,
                        LibraryElement library,
                        Uri uri) {
   String libraryName = uri.toString();
   if (library.entryCompilationUnit.script.name.contains(
           'dart/tests/compiler/dart2js_native')
+      || libraryName == 'dart:async'
       || libraryName == 'dart:html'
       || libraryName == 'dart:html_common'
       || libraryName == 'dart:indexed_db'
       || libraryName == 'dart:svg'
       || libraryName == 'dart:web_audio') {
     library.canUseNative = true;
   }
 }
 
 /**
@@ skipping 407 matching lines @@
   } else {
     if (parameters.parameterCount != 0) {
       compiler.cancel(
           'native "..." syntax is restricted to functions with zero parameters',
           node: nativeBody);
     }
     LiteralString jsCode = nativeBody.asLiteralString();
     builder.push(new HForeign.statement(jsCode.dartString, <HInstruction>[]));
   }
 }