Introduce typed selectors for getters and setters also for better tree shaking.

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.
 
 class WorkItem {
   final Element element;
   TreeElements resolutionTree;
   Function run;
   bool allowSpeculativeOptimization = true;
   List<HTypeGuard> guards = const <HTypeGuard>[];
@@ skipping 167 matching lines @@
     }
     tracer.close();
     log('compilation succeeded');
     return true;
   }
 
   void enableNoSuchMethod(Element element) {
     if (enabledNoSuchMethod) return;
     if (element.enclosingElement == objectClass) return;
     enabledNoSuchMethod = true;
-    enqueuer.registerInvocation(NO_SUCH_METHOD, new Invocation(2));
+    enqueuer.registerInvocation(NO_SUCH_METHOD, new Selector.invocation(2));
   }
 
   void enableIsolateSupport(LibraryElement element) {
     isolateLibrary = element;
     addToWorkList(element.find(START_ROOT_ISOLATE));
   }
 
   bool hasIsolateSupport() => isolateLibrary !== null;
 
   void onLibraryLoaded(LibraryElement library, Uri uri) {
@@ skipping 183 matching lines @@
 
   void registerDynamicInvocation(SourceString methodName, Selector selector) {
     assert(selector !== null);
     enqueuer.registerInvocation(methodName, selector);
   }
 
   void registerDynamicInvocationOf(Element element) {
     addToWorkList(element);
   }
 
-  void registerDynamicGetter(SourceString methodName) {
-    enqueuer.registerGetter(methodName);
+  void registerDynamicGetter(SourceString methodName, Selector selector) {
+    enqueuer.registerGetter(methodName, selector);
   }
 
-  void registerDynamicSetter(SourceString methodName) {
-    enqueuer.registerSetter(methodName);
+  void registerDynamicSetter(SourceString methodName, Selector selector) {
+    enqueuer.registerSetter(methodName, selector);
   }
 
   void registerInstantiatedClass(ClassElement element) {
     universe.instantiatedClasses.add(element);
     enqueuer.onRegisterInstantiatedClass(element);
   }
 
   // TODO(ngeoffray): This should get a type.
   void registerIsCheck(Element element) {
     universe.isChecks.add(element);
@@ skipping 147 matching lines @@
   }
 }
 
 class SourceSpan {
   final Uri uri;
   final int begin;
   final int end;
 
   const SourceSpan(this.uri, this.begin, this.end);
 }