Allow setting debugger breakpoints on CompareNilICs

src/builtins.h

 // 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 212 matching lines @@
   V(CallConstructStub_Recording_DebugBreak,    BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)                   \
   V(LoadIC_DebugBreak,                         LOAD_IC, DEBUG_STUB,           \
                                                DEBUG_BREAK)                   \
   V(KeyedLoadIC_DebugBreak,                    KEYED_LOAD_IC, DEBUG_STUB,     \
                                                DEBUG_BREAK)                   \
   V(StoreIC_DebugBreak,                        STORE_IC, DEBUG_STUB,          \
                                                DEBUG_BREAK)                   \
   V(KeyedStoreIC_DebugBreak,                   KEYED_STORE_IC, DEBUG_STUB,    \
                                                DEBUG_BREAK)                   \
+  V(CompareNilIC_DebugBreak,                   COMPARE_NIL_IC, DEBUG_STUB,    \
+                                               DEBUG_BREAK)                   \
   V(Slot_DebugBreak,                           BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)                   \
   V(PlainReturn_LiveEdit,                      BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)                   \
   V(FrameDropper_LiveEdit,                     BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)
 #else
 #define BUILTIN_LIST_DEBUG_A(V)
 #endif
 
@@ skipping 164 matching lines @@
 
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_BUILTINS_H_