Implement Function.apply in dart2js.

lib/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.
 
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 const bool REPORT_EXCESS_RESOLUTION = false;
@@ skipping 113 matching lines @@
   ClassElement boolClass;
   ClassElement numClass;
   ClassElement intClass;
   ClassElement doubleClass;
   ClassElement stringClass;
   ClassElement functionClass;
   ClassElement nullClass;
   ClassElement listClass;
   Element assertMethod;
   Element identicalFunction;
+  Element functionApplyMethod;
 
   Element get currentElement => _currentElement;
   withCurrentElement(Element element, f()) {
     Element old = currentElement;
     _currentElement = element;
     try {
       return f();
     } on CompilerCancelledException catch (ex) {
       throw;
     } on StackOverflowException catch (ex) {
@@ skipping 27 matching lines @@
   EnqueueTask enqueuer;
 
   static const SourceString MAIN = const SourceString('main');
   static const SourceString CALL_OPERATOR_NAME = const SourceString('call');
   static const SourceString NO_SUCH_METHOD = const SourceString('noSuchMethod');
   static const SourceString RUNTIME_TYPE = const SourceString('runtimeType');
   static const SourceString START_ROOT_ISOLATE =
       const SourceString('startRootIsolate');
   bool enabledNoSuchMethod = false;
   bool enabledRuntimeType = false;
+  bool enabledFunctionApply = false;
 
   Stopwatch progress;
 
   static const int PHASE_SCANNING = 0;
   static const int PHASE_RESOLVING = 1;
   static const int PHASE_COMPILING = 2;
   int phase;
 
   bool compilationFailed = false;
 
@@ skipping 186 matching lines @@
     importHelperLibrary(coreImplLibrary);
     importHelperLibrary(interceptorsLibrary);
 
     addForeignFunctions(jsHelperLibrary);
     addForeignFunctions(interceptorsLibrary);
 
     assertMethod = jsHelperLibrary.find(const SourceString('assert'));
     identicalFunction = coreLibrary.find(const SourceString('identical'));
 
     initializeSpecialClasses();
+
+    functionClass.ensureResolved(this);
+    functionApplyMethod =
+        functionClass.lookupLocalMember(const SourceString('apply'));
   }
 
   void loadCoreImplLibrary() {
     Uri coreImplUri = new Uri.fromComponents(scheme: 'dart', path: 'coreimpl');
     coreImplLibrary = scanner.loadLibrary(coreImplUri, null, coreImplUri);
   }
 
   void importHelperLibrary(LibraryElement library) {
     if (jsHelperLibrary !== null) {
       scanner.importLibrary(library, jsHelperLibrary, null);
@@ skipping 453 matching lines @@
  * information in the generated error message.
  */
 bool invariant(Spannable spannable, var condition, {String message: null}) {
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   return spannable != null && condition;
 }