Remove debugger_auto_break flag

src/flag-definitions.h

 // 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 453 matching lines @@
 // debug.cc
 DEFINE_bool(trace_debug_json, false, "trace debugging JSON request/response")
 DEFINE_bool(trace_js_array_abuse, false,
             "trace out-of-bounds accesses to JS arrays")
 DEFINE_bool(trace_external_array_abuse, false,
             "trace out-of-bounds-accesses to external arrays")
 DEFINE_bool(trace_array_abuse, false,
             "trace out-of-bounds accesses to all arrays")
 DEFINE_implication(trace_array_abuse, trace_js_array_abuse)
 DEFINE_implication(trace_array_abuse, trace_external_array_abuse)
-DEFINE_bool(debugger_auto_break, true,
-            "automatically set the debug break flag when debugger commands are "
-            "in the queue")
 DEFINE_bool(enable_liveedit, true, "enable liveedit experimental feature")
 DEFINE_bool(hard_abort, true, "abort by crashing")
 
 // execution.cc
 // Slightly less than 1MB on 64-bit, since Windows' default stack size for
 // the main execution thread is 1MB for both 32 and 64-bit.
 DEFINE_int(stack_size, kPointerSize * 123,
            "default size of stack region v8 is allowed to use (in kBytes)")
 
 // frames.cc
@@ skipping 437 matching lines @@
 #undef DEFINE_ALIAS_float
 #undef DEFINE_ALIAS_args
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META
 #undef FLAG_MODE_DEFINE_IMPLICATIONS
 
 #undef COMMA