Eliminate the need for code delete events in CPU profiler.

src/cpu-profiler-inl.h

 // Copyright 2010 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 33 matching lines @@
     entry->set_shared_id(code_map->GetSharedId(shared));
   }
 }
 
 
 void CodeMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
   code_map->MoveCode(from, to);
 }
 
 
-void CodeDeleteEventRecord::UpdateCodeMap(CodeMap* code_map) {
-  code_map->DeleteCode(start);
-}
-
-
 void SharedFunctionInfoMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
   code_map->MoveCode(from, to);
 }
 
 
 TickSample* ProfilerEventsProcessor::TickSampleEvent() {
   generator_->Tick();
   TickSampleEventRecord* evt =
       new(ticks_buffer_.Enqueue()) TickSampleEventRecord(enqueue_order_);
   return &evt->sample;
 }
 
 
 bool ProfilerEventsProcessor::FilterOutCodeCreateEvent(
     Logger::LogEventsAndTags tag) {
   return FLAG_prof_browser_mode
       && (tag != Logger::CALLBACK_TAG
           && tag != Logger::FUNCTION_TAG
           && tag != Logger::LAZY_COMPILE_TAG
           && tag != Logger::REG_EXP_TAG
           && tag != Logger::SCRIPT_TAG);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_CPU_PROFILER_INL_H_