Revert revision 33053

third_party/pkg/di/lib/dynamic_injector.dart

Index: third_party/pkg/di/lib/dynamic_injector.dart
===================================================================
--- third_party/pkg/di/lib/dynamic_injector.dart	(revision 33054)
+++ third_party/pkg/di/lib/dynamic_injector.dart	(working copy)
@@ -30,23 +30,8 @@
 
     MethodMirror ctor = classMirror.declarations[classMirror.simpleName];
 
-    if (ctor == null) {
-      throw new NoProviderError('Unable to find default constructor for $type. '
-          'Make sure class has a default constructor.' +
-          (1.0 is int ?
-              ' Make sure you have correctly configured @MirrorsUsed.' : ''));
-    }
-
     resolveArgument(int pos) {
       ParameterMirror p = ctor.parameters[pos];
-      if (MirrorSystem.getName(p.type.qualifiedName) == 'dynamic') {
-        var name = MirrorSystem.getName(p.simpleName);
-        throw new NoProviderError(error("The '$name' parameter must be typed"));
-      }
-      if (p.type is TypedefMirror) {
-        throw new NoProviderError(
-            error('Cannot create new instance of a typedef ${p.type}'));
-      }
       return getInstanceByType(getReflectedTypeWorkaround(p.type), requestor);
     }