Enable optimization of functions with generic switches.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 0bbb90452a674c21619b8abc167594a1fc63f4b8..cfcb05702435c24499708107f1b132b7e8f77b7b 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -115,17 +115,14 @@ namespace internal {
   V(CountOperation)                             \
   V(BinaryOperation)                            \
   V(CompareOperation)                           \
-  V(ThisFunction)
-
-#define AUXILIARY_NODE_LIST(V)                  \
+  V(ThisFunction)                               \
   V(CaseClause)
 
 #define AST_NODE_LIST(V)                        \
   DECLARATION_NODE_LIST(V)                      \
   MODULE_NODE_LIST(V)                           \
   STATEMENT_NODE_LIST(V)                        \
-  EXPRESSION_NODE_LIST(V)                       \
-  AUXILIARY_NODE_LIST(V)
+  EXPRESSION_NODE_LIST(V)
 
 // Forward declarations
 class AstConstructionVisitor;
@@ -1106,7 +1103,7 @@ class WithStatement V8_FINAL : public Statement {
 };
 
 
-class CaseClause V8_FINAL : public AstNode {
+class CaseClause V8_FINAL : public Expression {
  public:
   DECLARE_NODE_TYPE(CaseClause)