Initial support for 'Extract temp' - only when single expression selected

compiler/java/com/google/dart/compiler/ast/ASTVisitor.java

Index: compiler/java/com/google/dart/compiler/ast/ASTVisitor.java
diff --git a/compiler/java/com/google/dart/compiler/ast/ASTVisitor.java b/compiler/java/com/google/dart/compiler/ast/ASTVisitor.java
index 153e726899cc8717a13294fb077ac598230d6aa8..774c2e4c084f0cf096a31ed15e72e0c5752bdb29 100644
--- a/compiler/java/com/google/dart/compiler/ast/ASTVisitor.java
+++ b/compiler/java/com/google/dart/compiler/ast/ASTVisitor.java
@@ -82,7 +82,7 @@ public class ASTVisitor<R> {
   }
 
   public R visitArrayLiteral(DartArrayLiteral node) {
-    return visitExpression(node);
+    return visitTypedLiteral(node);
   }
 
   public R visitAssertion(DartAssertion node) {
@@ -213,9 +213,13 @@ public class ASTVisitor<R> {
     return visitDirective(node);
   }
 
-  public R visitMapLiteral(DartMapLiteral node) {
+  public R visitTypedLiteral(DartTypedLiteral node) {
     return visitExpression(node);
   }
+  
+  public R visitMapLiteral(DartMapLiteral node) {
+    return visitTypedLiteral(node);
+  }
 
   public R visitMapLiteralEntry(DartMapLiteralEntry node) {
     return visitNode(node);