Revert "Set runtime type on list and map literals."

sdk/lib/_internal/compiler/implementation/js_backend/backend.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 js_backend;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
   final Set<HInstruction> allocatedFixedLists = new Set<HInstruction>();
 }
@@ skipping 1091 matching lines @@
         });
       }
     }
 
     if (type is InterfaceType) {
       InterfaceType itf = type;
       itf.typeArguments.forEach((DartType argument) {
         analyzeTypeArgument(type, argument);
       });
     }
+    // TODO(ngeoffray): Also handle T a (in checked mode).
   }
 
   void registerClassUsingVariableExpression(ClassElement cls) {
     rti.classesUsingTypeVariableExpression.add(cls);
   }
 
   bool classNeedsRti(ClassElement cls) {
     return rti.classesNeedingRti.contains(cls.declaration) ||
         compiler.enabledRuntimeType;
   }
@@ skipping 738 matching lines @@
     copy(constant.values);
     copy(constant.protoValue);
     copy(constant);
   }
 
   void visitConstructed(ConstructedConstant constant) {
     copy(constant.fields);
     copy(constant);
   }
 }