Reapply r1900, r1897, r1895 with a fix....

src/spaces-inl.h

 // Copyright 2006-2008 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
@@ skipping 46 matching lines @@
   ASSERT(cur_addr_ <= cur_limit_);
 
   return obj;
 }
 
 
 // -----------------------------------------------------------------------------
 // PageIterator
 
 bool PageIterator::has_next() {
-  return cur_page_ != stop_page_;
+  return prev_page_ != stop_page_;
 }
 
 
 Page* PageIterator::next() {
   ASSERT(has_next());
-  Page* result = cur_page_;
-  cur_page_ = cur_page_->next_page();
-  return result;
+  prev_page_ = (prev_page_ == NULL)
+               ? space_->first_page_
+               : prev_page_->next_page();
+  return prev_page_;
 }
 
 
 // -----------------------------------------------------------------------------
 // Page
 
 Page* Page::next_page() {
   return MemoryAllocator::GetNextPage(this);
 }
 
@@ skipping 261 matching lines @@
   ASSERT(space->low() <= alloc_info->top
          && alloc_info->top <= space->high()
          && alloc_info->limit == space->high());
 #endif
   return obj;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_INL_H_