Avoid some crashes when running without snapshots.

src/profile-generator.h

-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
@@ skipping 902 matching lines @@
 // An implementation of V8 heap graph extractor.
 class V8HeapExplorer : public HeapEntriesAllocator {
  public:
   V8HeapExplorer(HeapSnapshot* snapshot,
                  SnapshottingProgressReportingInterface* progress);
   virtual ~V8HeapExplorer();
   virtual HeapEntry* AllocateEntry(
       HeapThing ptr, int children_count, int retainers_count);
   void AddRootEntries(SnapshotFillerInterface* filler);
   int EstimateObjectsCount(HeapIterator* iterator);
-  bool IterateAndExtractReferences(HeapIterator* iterator,
-                                   SnapshotFillerInterface* filler);
+  bool IterateAndExtractReferences(SnapshotFillerInterface* filler);
   void TagGlobalObjects();
 
   static HeapObject* const kInternalRootObject;
 
  private:
   HeapEntry* AddEntry(
       HeapObject* object, int children_count, int retainers_count);
   HeapEntry* AddEntry(HeapObject* object,
                       HeapEntry::Type type,
                       const char* name,
@@ skipping 110 matching lines @@
 class HeapSnapshotGenerator : public SnapshottingProgressReportingInterface {
  public:
   HeapSnapshotGenerator(HeapSnapshot* snapshot,
                         v8::ActivityControl* control);
   bool GenerateSnapshot();
 
  private:
   bool ApproximateRetainedSizes();
   bool BuildDominatorTree(const Vector<HeapEntry*>& entries,
                           Vector<HeapEntry*>* dominators);
-  bool CountEntriesAndReferences(HeapIterator* iterator);
-  bool FillReferences(HeapIterator* iterator);
+  bool CountEntriesAndReferences();
+  bool FillReferences();
   void FillReversePostorderIndexes(Vector<HeapEntry*>* entries);
   void ProgressStep();
   bool ProgressReport(bool force = false);
   bool SetEntriesDominators();
-  void SetProgressTotal(HeapIterator* iterator, int iterations_count);
+  void SetProgressTotal(int iterations_count);
 
   HeapSnapshot* snapshot_;
   v8::ActivityControl* control_;
   V8HeapExplorer v8_heap_explorer_;
   NativeObjectsExplorer dom_explorer_;
   // Mapping from HeapThing pointers to HeapEntry* pointers.
   HeapEntriesMap entries_;
   // Used during snapshot generation.
   int progress_counter_;
   int progress_total_;
@@ skipping 49 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 
 String* GetConstructorNameForHeapProfile(JSObject* object);
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_