Add missing AllowHandleDereference to LAllocator::BuildLiveRanges.

src/lithium-allocator.cc

 // Copyright 2012 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 1330 matching lines @@
       BitVector::Iterator iterator(live);
       bool found = false;
       while (!iterator.Done()) {
         found = true;
         int operand_index = iterator.Current();
         if (chunk_->info()->IsStub()) {
           CodeStub::Major major_key = chunk_->info()->code_stub()->MajorKey();
           PrintF("Function: %s\n", CodeStub::MajorName(major_key, false));
         } else {
           ASSERT(chunk_->info()->IsOptimizing());
+          AllowHandleDereference allow_deref;
           PrintF("Function: %s\n",
                  *chunk_->info()->function()->debug_name()->ToCString());
         }
         PrintF("Value %d used before first definition!\n", operand_index);
         LiveRange* range = LiveRangeFor(operand_index);
         PrintF("First use is at %d\n", range->first_pos()->pos().Value());
         iterator.Advance();
       }
       ASSERT(!found);
     }
@@ skipping 824 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal