Add NativeEnqueuer to work with the Enqueuer.

sdk/lib/_internal/compiler/implementation/compiler.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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 56 matching lines @@
       : this.constantSystem = constantSystem;
 
   void enqueueAllTopLevelFunctions(LibraryElement lib, Enqueuer world) {
     lib.forEachExport((Element e) {
       if (e.isFunction()) world.addToWorkList(e);
     });
   }
 
   void enqueueHelpers(Enqueuer world);
   void codegen(WorkItem work);
-  void processNativeClasses(Enqueuer world,
-                            Collection<LibraryElement> libraries);
+
+  // The backend determines the native resolution enqueuer, with a no-op
+  // default, so tools like dart2dart can ignore the native classes.
+  native.NativeEnqueuer nativeResolutionEnqueuer(world) {
+    return new native.NativeEnqueuer();
+  }
+  native.NativeEnqueuer nativeCodegenEnqueuer(world) {
+    return new native.NativeEnqueuer();
+  }
+
   void assembleProgram();
   List<CompilerTask> get tasks;
 
   // TODO(ahe,karlklose): rename this?
   void dumpInferredTypes() {}
 
   ItemCompilationContext createItemCompilationContext() {
     return new ItemCompilationContext();
   }
 
   SourceString getCheckedModeHelper(DartType type) => null;
   void registerInstantiatedClass(ClassElement cls, Enqueuer enqueuer) {}
 
   Element getInterceptor(Selector selector);
 }
 
 abstract class Compiler implements DiagnosticListener {
   final Map<String, LibraryElement> libraries;
   int nextFreeClassId = 0;
   World world;
   String assembledCode;
   Types types;
 
   final bool enableMinification;
   final bool enableTypeAssertions;
   final bool enableUserAssertions;
   final bool enableConcreteTypeInference;
   final bool analyzeAll;
+  final bool enableNativeLiveTypeAnalysis;
 
   bool disableInlining = false;
 
   final Tracer tracer;
 
   CompilerTask measuredTask;
   Element _currentElement;
   LibraryElement coreLibrary;
   LibraryElement isolateLibrary;
   LibraryElement jsHelperLibrary;
@@ skipping 87 matching lines @@
 
   bool compilationFailed = false;
 
   bool hasCrashed = false;
 
   Compiler({this.tracer: const Tracer(),
             this.enableTypeAssertions: false,
             this.enableUserAssertions: false,
             this.enableConcreteTypeInference: false,
             this.enableMinification: false,
+            this.enableNativeLiveTypeAnalysis: false,
             bool emitJavaScript: true,
             bool generateSourceMap: true,
             bool disallowUnsafeEval: false,
             this.analyzeAll: false,
             List<String> strips: const []})
       : libraries = new Map<String, LibraryElement>(),
         progress = new Stopwatch() {
     progress.start();
     world = new World(this);
     scanner = new ScannerTask(this);
@@ skipping 291 matching lines @@
       parameters.forEachParameter((Element parameter) {
         reportFatalError('main cannot have parameters', parameter);
       });
     }
 
     log('Resolving...');
     phase = PHASE_RESOLVING;
     if (analyzeAll) libraries.forEach((_, lib) => fullyEnqueueLibrary(lib));
     backend.enqueueHelpers(enqueuer.resolution);
     processQueue(enqueuer.resolution, main);
-    log('Resolved ${enqueuer.resolution.resolvedElements.length} elements.');
+    enqueuer.resolution.logSummary(log);
 
     if (compilationFailed) return;
 
     log('Inferring types...');
     typesTask.onResolutionComplete(main);
 
     // TODO(ahe): Remove this line. Eventually, enqueuer.resolution
     // should know this.
     world.populate();
 
     log('Compiling...');
     phase = PHASE_COMPILING;
     processQueue(enqueuer.codegen, main);
-    log('Compiled ${codegenWorld.generatedCode.length} methods.');
+    enqueuer.codegen.logSummary(log);
 
     if (compilationFailed) return;
 
     backend.assembleProgram();
 
     checkQueues();
   }
 
   void fullyEnqueueLibrary(LibraryElement library) {
     library.forEachLocalMember(fullyEnqueueTopLevelElement);
   }
 
   void fullyEnqueueTopLevelElement(Element element) {
     if (element.isClass()) {
       ClassElement cls = element;
       cls.ensureResolved(this);
       for (Element member in cls.localMembers) {
         enqueuer.resolution.addToWorkList(member);
       }
     } else {
       enqueuer.resolution.addToWorkList(element);
     }
   }
 
   void processQueue(Enqueuer world, Element main) {
-    backend.processNativeClasses(world, libraries.values);
+    world.nativeEnqueuer.processNativeClasses(libraries.values);
     world.addToWorkList(main);
     progress.reset();
     world.forEach((WorkItem work) {
       withCurrentElement(work.element, () => work.run(this, world));
     });
     world.queueIsClosed = true;
     if (compilationFailed) return;
     assert(world.checkNoEnqueuedInvokedInstanceMethods());
     if (DUMP_INFERRED_TYPES && phase == PHASE_COMPILING) {
       backend.dumpInferredTypes();
@@ skipping 338 matching lines @@
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   if (spannable == null || !condition) {
     throw new SpannableAssertionFailure(spannable, message);
   }
   return true;
 }