Eliminate the need for code delete events in CPU profiler.

src/cpu-profiler.cc

 // 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 119 matching lines @@
   CodeEventsContainer evt_rec;
   CodeMoveEventRecord* rec = &evt_rec.CodeMoveEventRecord_;
   rec->type = CodeEventRecord::CODE_MOVE;
   rec->order = ++enqueue_order_;
   rec->from = from;
   rec->to = to;
   events_buffer_.Enqueue(evt_rec);
 }
 
 
-void ProfilerEventsProcessor::CodeDeleteEvent(Address from) {
-  CodeEventsContainer evt_rec;
-  CodeDeleteEventRecord* rec = &evt_rec.CodeDeleteEventRecord_;
-  rec->type = CodeEventRecord::CODE_DELETE;
-  rec->order = ++enqueue_order_;
-  rec->start = from;
-  events_buffer_.Enqueue(evt_rec);
-}
-
-
 void ProfilerEventsProcessor::SharedFunctionInfoMoveEvent(Address from,
                                                           Address to) {
   CodeEventsContainer evt_rec;
   SharedFunctionInfoMoveEventRecord* rec =
       &evt_rec.SharedFunctionInfoMoveEventRecord_;
   rec->type = CodeEventRecord::SHARED_FUNC_MOVE;
   rec->order = ++enqueue_order_;
   rec->from = from;
   rec->to = to;
   events_buffer_.Enqueue(evt_rec);
@@ skipping 258 matching lines @@
       code->ExecutableSize());
 }
 
 
 void CpuProfiler::CodeMoveEvent(Address from, Address to) {
   Isolate::Current()->cpu_profiler()->processor_->CodeMoveEvent(from, to);
 }
 
 
 void CpuProfiler::CodeDeleteEvent(Address from) {
-  Isolate::Current()->cpu_profiler()->processor_->CodeDeleteEvent(from);
 }
 
 
 void CpuProfiler::SharedFunctionInfoMoveEvent(Address from, Address to) {
   CpuProfiler* profiler = Isolate::Current()->cpu_profiler();
   profiler->processor_->SharedFunctionInfoMoveEvent(from, to);
 }
 
 
 void CpuProfiler::GetterCallbackEvent(String* name, Address entry_point) {
@@ skipping 144 matching lines @@
 
 void CpuProfiler::TearDown() {
   Isolate* isolate = Isolate::Current();
   if (isolate->cpu_profiler() != NULL) {
     delete isolate->cpu_profiler();
   }
   isolate->set_cpu_profiler(NULL);
 }
 
 } }  // namespace v8::internal