Hook up full list literal type inference logic.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/body_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index f53712d1d989358907de60dc657c87c27668d2cc..22e7d3ea8f06dcadd03b043e2ce0e797703ba090 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -1283,11 +1283,11 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
     debugEvent("LiteralList");
     List<Expression> expressions = popListForValue(count);
     List<DartType> typeArguments = pop();
-    DartType typeArgument = const DynamicType();
+    DartType typeArgument;
     if (typeArguments != null) {
       typeArgument = typeArguments.first;
       if (typeArguments.length > 1) {
-        typeArgument = const DynamicType();
+        typeArgument = null;
         warningNotError(
             "Too many type arguments on List literal.", beginToken.charOffset);
       }