hg: jdk9/sandbox/langtools: 8172910: Use default methods as appropriate for language model visitors

[chris.hegarty at oracle.com]

Changeset: 4a937fde7b91
Author:    darcy
Date:      2017-01-18 19:39 -0800
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/4a937fde7b91

8172910: Use default methods as appropriate for language model visitors
Reviewed-by: jjg

! src/java.compiler/share/classes/javax/lang/model/element/AnnotationValueVisitor.java
! src/java.compiler/share/classes/javax/lang/model/element/ElementVisitor.java
! src/java.compiler/share/classes/javax/lang/model/type/TypeVisitor.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor6.java
+ test/tools/javac/processing/model/TestVisitorDefaults.java