Introduce typed selectors to do better tree shaking based on calls on 'this'. Getters and setters w…

lib/compiler/implementation/emitter.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.
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
 class ClosureInvocationElement extends FunctionElement {
   ClosureInvocationElement(SourceString name,
@@ skipping 150 matching lines @@
       buffer.add('  return this.${namer.getName(member)}($arguments)');
   }
     buffer.add('\n};\n');
   }
 
   void addParameterStubs(FunctionElement member,
                          String attachTo(String invocationName),
                          StringBuffer buffer) {
     Set<Selector> selectors = compiler.universe.invokedNames[member.name];
     if (selectors == null) return;
-    FunctionParameters parameters = member.computeParameters(compiler);
     for (Selector selector in selectors) {
-      if (!selector.applies(parameters)) continue;
+      if (!selector.applies(member, compiler)) continue;
       addParameterStub(member, attachTo, buffer, selector);
     }
   }
 
   void addInstanceMember(Element member,
                          String attachTo(String name),
                          StringBuffer buffer) {
     // TODO(floitsch): we don't need to deal with members of
     // uninstantiated classes, that have been overwritten by subclasses.
 
@@ skipping 550 matching lines @@
       mainBuffer.add(
           'var ${namer.CURRENT_ISOLATE} = new ${namer.ISOLATE}();\n');
       nativeEmitter.emitDynamicDispatchMetadata();
       nativeEmitter.assembleCode(mainBuffer);
       emitMain(mainBuffer);
       compiler.assembledCode = mainBuffer.toString();
     });
     return compiler.assembledCode;
   }
 }