Merged r15267, r15610, r15723, r15724, r15725, r15728 into 3.19 branch.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index b07456b8f789ed9f03d6aa8b82a2409bf0fe004b..e5d31670bc2f0210d153db58b1376fc083809d9d 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -353,8 +353,8 @@ class Expression: public AstNode {
   // True iff the expression is the null literal.
   bool IsNullLiteral();
 
-  // True iff the expression is the undefined literal.
-  bool IsUndefinedLiteral();
+  // True if we can prove that the expression is the undefined literal.
+  bool IsUndefinedLiteral(Isolate* isolate);
 
   // Expression type
   Handle<Type> type() { return type_; }
@@ -2002,7 +2002,7 @@ class CompareOperation: public Expression {
 
   // Match special cases.
   bool IsLiteralCompareTypeof(Expression** expr, Handle<String>* check);
-  bool IsLiteralCompareUndefined(Expression** expr);
+  bool IsLiteralCompareUndefined(Expression** expr, Isolate* isolate);
   bool IsLiteralCompareNull(Expression** expr);
 
  protected: