Visit all roots in the UnreachableObjectsFilter.

If an object is only referenced from DOM wrappers, it can only
be seen if all roots are visited.

Review URL: http://codereview.chromium.org/6226004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6267 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -5029,7 +5029,7 @@ class UnreachableObjectsFilter : public HeapObjectsFilter {
       obj->SetMark();
     }
     UnmarkingVisitor visitor;
-    Heap::IterateRoots(&visitor, VISIT_ONLY_STRONG);
+    Heap::IterateRoots(&visitor, VISIT_ALL);
     while (visitor.can_process())
       visitor.ProcessNext();
   }

src/profile-generator.cc

@@ -2385,7 +2385,7 @@ bool HeapSnapshotGenerator::IterateAndExtractReferences() {
   if (interrupted) return false;
   SetRootGcRootsReference();
   RootsReferencesExtractor extractor(this);
-  Heap::IterateRoots(&extractor, VISIT_ONLY_STRONG);
+  Heap::IterateRoots(&extractor, VISIT_ALL);
   return ReportProgress();
 }