Revert "[Arguments] Merge (7442,7496] from bleeding_edge."

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 78faea1b3246478cf50ec908c4b5d5caa23b6063..74cb0493eb01c595739fcb10f92e2b82fae4f624 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -280,9 +280,6 @@ class RegExpBuilder: public ZoneObject {
   void FlushCharacters();
   void FlushText();
   void FlushTerms();
-  Zone* zone() { return zone_; }
-
-  Zone* zone_;
   bool pending_empty_;
   ZoneList<uc16>* characters_;
   BufferedZoneList<RegExpTree, 2> terms_;
@@ -392,7 +389,6 @@ class RegExpParser {
   };
 
   Isolate* isolate() { return isolate_; }
-  Zone* zone() { return isolate_->zone(); }
 
   uc32 current() { return current_; }
   bool has_more() { return has_more_; }
@@ -457,7 +453,6 @@ class Parser {
   };
 
   Isolate* isolate() { return isolate_; }
-  Zone* zone() { return isolate_->zone(); }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(Handle<String> source,