Issue 6710. Report error for function libteral with return type and name.

compiler/java/com/google/dart/compiler/parser/DartParser.java

Index: compiler/java/com/google/dart/compiler/parser/DartParser.java
diff --git a/compiler/java/com/google/dart/compiler/parser/DartParser.java b/compiler/java/com/google/dart/compiler/parser/DartParser.java
index 91a7a095e565db6a71cf81d9bb69410d442cb0a4..129eb6a45e704b42c75b9775166495a7e48ccbb7 100644
--- a/compiler/java/com/google/dart/compiler/parser/DartParser.java
+++ b/compiler/java/com/google/dart/compiler/parser/DartParser.java
@@ -3570,6 +3570,11 @@ public class DartParser extends CompletionHooksParserBase {
       rollback();
       return null;
     }
+    if (function != null && function.getReturnTypeNode() != null) {
+      reportError(function.getReturnTypeNode(), ParserErrorCode.DEPRECATED_FUNCTION_LITERAL);
+    } else if (namePtr[0] != null) {
+      reportError(namePtr[0], ParserErrorCode.DEPRECATED_FUNCTION_LITERAL);
+    }
     return done(new DartFunctionExpression(namePtr[0], doneWithoutConsuming(function), false));
   }