Issue 7802. Fix for redundant casts.

compiler/java/com/google/dart/compiler/type/Types.java

Index: compiler/java/com/google/dart/compiler/type/Types.java
diff --git a/compiler/java/com/google/dart/compiler/type/Types.java b/compiler/java/com/google/dart/compiler/type/Types.java
index 14faa69525a74218929789f859a36ec793aab128..44f401e282e6f357ddcd93d9b9dbb679aa290622 100644
--- a/compiler/java/com/google/dart/compiler/type/Types.java
+++ b/compiler/java/com/google/dart/compiler/type/Types.java
@@ -748,7 +748,7 @@ public class Types {
     }
     Set<Class<?>> interfaceSet = getAllImplementedInterfaces(type.getClass());
     if (!interfaceSet.isEmpty()) {
-      Class<?>[] interfaces = (Class[]) interfaceSet.toArray(new Class[interfaceSet.size()]);
+      Class<?>[] interfaces = interfaceSet.toArray(new Class[interfaceSet.size()]);
       return makeInferred(type, interfaces, quality);
     }
     return type;