Thread/Isolate refactoring: new(Isolate) -> new(Zone)

runtime/vm/regexp_parser.h

Index: runtime/vm/regexp_parser.h
===================================================================
--- runtime/vm/regexp_parser.h	(revision 44266)
+++ runtime/vm/regexp_parser.h	(working copy)
@@ -32,9 +32,9 @@
   void FlushText();
   void FlushTerms();
 
-  Isolate* isolate() const { return isolate_; }
+  Zone* zone() const { return zone_; }
 
-  Isolate* isolate_;
+  Zone* zone_;
   bool pending_empty_;
   ZoneGrowableArray<uint16_t>* characters_;
   GrowableArray<RegExpTree*> terms_;
@@ -118,9 +118,9 @@
     RegExpParserState(RegExpParserState* previous_state,
                       SubexpressionType group_type,
                       intptr_t disjunction_capture_index,
-                      Isolate *isolate)
+                      Zone *zone)
         : previous_state_(previous_state),
-          builder_(new(isolate) RegExpBuilder()),
+          builder_(new(zone) RegExpBuilder()),
           group_type_(group_type),
           disjunction_capture_index_(disjunction_capture_index) {}
     // Parser state of containing expression, if any.
@@ -146,7 +146,7 @@
     intptr_t disjunction_capture_index_;
   };
 
-  Isolate* isolate() { return isolate_; }
+  Zone* zone() { return zone_; }
 
   uint32_t current() { return current_; }
   bool has_more() { return has_more_; }
@@ -155,7 +155,7 @@
   const String& in() { return in_; }
   void ScanForCaptures();
 
-  Isolate* isolate_;
+  Zone* zone_;
   String* error_;
   ZoneGrowableArray<RegExpCapture*>* captures_;
   const String& in_;