Handle super calls in the backend type inferrer.

sdk/lib/_internal/compiler/implementation/ssa/codegen.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 ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 1630 matching lines @@
     } else {
       String methodName = backend.namer.getName(superMethod);
       String className = backend.namer.isolateAccess(superClass);
       js.VariableUse classReference = new js.VariableUse(className);
       js.PropertyAccess prototype =
           new js.PropertyAccess.field(classReference, "prototype");
       js.PropertyAccess method =
           new js.PropertyAccess.field(prototype, methodName);
       push(jsPropertyCall(
           method, "call", visitArguments(node.inputs, start: 0)), node);
+      // Register this invocation to collect the types used at all call sites.
+      backend.registerDynamicInvocation(node, node.selector);
     }
     world.registerStaticUse(superMethod);
   }
 
   visitFieldGet(HFieldGet node) {
     use(node.receiver);
     Element element = node.element;
     if (element == backend.jsIndexableLength) {
       // We're accessing a native JavaScript property called 'length'
       // on a JS String or a JS array. Therefore, the name of that
@@ skipping 1298 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }