As discussed on the phone, I'd like your thoughts on the...

src/v8-counters.h

 // Copyright 2007-2008 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 83 matching lines @@
   SC(total_stubs_code_size, V8.TotalStubsCodeSize)                  \
   /* Amount of (JS) compiled code. */                               \
   SC(total_compiled_code_size, V8.TotalCompiledCodeSize)            \
   SC(gc_compactor_caused_by_request, V8.GCCompactorCausedByRequest) \
   SC(gc_compactor_caused_by_promoted_data,                          \
      V8.GCCompactorCausedByPromotedData)                            \
   SC(gc_compactor_caused_by_oldspace_exhaustion,                    \
      V8.GCCompactorCausedByOldspaceExhaustion)                      \
   SC(gc_compactor_caused_by_weak_handles,                           \
      V8.GCCompactorCausedByWeakHandles)                             \
+  SC(gc_last_resort_from_js, V8.GCLastResortFromJS)                 \
+  SC(gc_last_resort_from_handles, V8.GCLastResortFromHandles)       \
   /* How is the generic keyed-load stub used? */                    \
   SC(keyed_load_generic_smi, V8.KeyedLoadGenericSmi)                \
   SC(keyed_load_generic_symbol, V8.KeyedLoadGenericSymbol)          \
   SC(keyed_load_generic_slow, V8.KeyedLoadGenericSlow)              \
   /* Count how much the monomorphic keyed-load stubs are hit. */    \
   SC(keyed_load_function_prototype, V8.KeyedLoadFunctionPrototype)  \
   SC(keyed_load_string_length, V8.KeyedLoadStringLength)            \
   SC(keyed_load_array_length, V8.KeyedLoadArrayLength)              \
   SC(keyed_load_constant_function, V8.KeyedLoadConstantFunction)    \
   SC(keyed_load_field, V8.KeyedLoadField)                           \
@@ skipping 35 matching lines @@
     stats_counter_count
   };
 
   // Sliding state window counters.
   static StatsCounter state_counters[];
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_COUNTERS_H_