Fix PathTracer.

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_H_
 #define V8_HEAP_H_
 
 #include <cmath>
 
 #include "allocation.h"
@@ skipping 2699 matching lines @@
 // Helper class for tracing paths to a search target Object from all roots.
 // The TracePathFrom() method can be used to trace paths from a specific
 // object to the search target object.
 class PathTracer : public ObjectVisitor {
  public:
   enum WhatToFind {
     FIND_ALL,   // Will find all matches.
     FIND_FIRST  // Will stop the search after first match.
   };
 
+  // Tags 0, 1, and 3 are used. Use 2 for marking visited HeapObject.
+  static const int kMarkTag = 2;
+
   // For the WhatToFind arg, if FIND_FIRST is specified, tracing will stop
   // after the first match.  If FIND_ALL is specified, then tracing will be
   // done for all matches.
   PathTracer(Object* search_target,
              WhatToFind what_to_find,
              VisitMode visit_mode)
       : search_target_(search_target),
         found_target_(false),
         found_target_in_trace_(false),
         what_to_find_(what_to_find),
@@ skipping 11 matching lines @@
   static Object* const kAnyGlobalObject;
 
  protected:
   class MarkVisitor;
   class UnmarkVisitor;
 
   void MarkRecursively(Object** p, MarkVisitor* mark_visitor);
   void UnmarkRecursively(Object** p, UnmarkVisitor* unmark_visitor);
   virtual void ProcessResults();
 
-  // Tags 0, 1, and 3 are used. Use 2 for marking visited HeapObject.
-  static const int kMarkTag = 2;
-
   Object* search_target_;
   bool found_target_;
   bool found_target_in_trace_;
   WhatToFind what_to_find_;
   VisitMode visit_mode_;
   List<Object*> object_stack_;
 
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_