Exclude filler maps from object properties in heap snapshot.

Review URL: https://chromiumcodereview.appspot.com/10167013

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11411 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/profile-generator.cc

@@ -2501,7 +2501,10 @@ bool V8HeapExplorer::IsEssentialObject(Object* object) {
       && object != heap_->raw_unchecked_empty_descriptor_array()
       && object != heap_->raw_unchecked_fixed_array_map()
       && object != heap_->raw_unchecked_global_property_cell_map()
-      && object != heap_->raw_unchecked_shared_function_info_map();
+      && object != heap_->raw_unchecked_shared_function_info_map()
+      && object != heap_->raw_unchecked_free_space_map()
+      && object != heap_->raw_unchecked_one_pointer_filler_map()
+      && object != heap_->raw_unchecked_two_pointer_filler_map();
 }