Fix debug tests.

src/spaces.cc

 // 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
@@ skipping 1315 matching lines @@
   }
   anchor()->set_next_page(anchor());
   anchor()->set_prev_page(anchor());
 
   committed_ = false;
   return true;
 }
 
 
 bool SemiSpace::GrowTo(int new_capacity) {
+  if (!is_committed()) {
+    bool ok = Commit();
+    if (!ok) return false;
+  }
   ASSERT((new_capacity & Page::kPageAlignmentMask) == 0);
   ASSERT(new_capacity <= maximum_capacity_);
   ASSERT(new_capacity > capacity_);
   int pages_before = capacity_ / Page::kPageSize;
   int pages_after = new_capacity / Page::kPageSize;
 
   Address end = start_ + maximum_capacity_;
   Address start = end - new_capacity;
   size_t delta = new_capacity - capacity_;
 
@@ skipping 1484 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal