[flags] Remove unused FLAG_log_handles and related code

Change-Id: I97d29623e163ceee450814f03fba745d478082ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3574550
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79839}

src/flags/flag-definitions.h

@@ -2016,7 +2016,6 @@ DEFINE_BOOL(log_code, false,
 DEFINE_BOOL(log_code_disassemble, false,
             "Log all disassembled code to the log file.")
 DEFINE_IMPLICATION(log_code_disassemble, log_code)
-DEFINE_BOOL(log_handles, false, "Log global handle events.")
 DEFINE_BOOL(log_source_code, false, "Log source code.")
 DEFINE_BOOL(log_function_events, false,
             "Log function events "

src/init/v8.cc

@@ -138,7 +138,6 @@ void V8::Initialize() {
                            &FLAG_log_api,
                            &FLAG_log_code,
                            &FLAG_log_code_disassemble,
-                           &FLAG_log_handles,
                            &FLAG_log_source_code,
                            &FLAG_log_function_events,
                            &FLAG_log_internal_timer_events,

src/logging/log.cc

@@ -1074,13 +1074,6 @@ void Logger::IntPtrTEvent(const char* name, intptr_t value) {
   msg.WriteToLogFile();
 }
 
-void Logger::HandleEvent(const char* name, Address* location) {
-  if (!FLAG_log_handles) return;
-  MSG_BUILDER();
-  msg << name << kNext << reinterpret_cast<void*>(location);
-  msg.WriteToLogFile();
-}
-
 void Logger::WriteApiSecurityCheck() {
   DCHECK(FLAG_log_api);
   MSG_BUILDER();

src/logging/log.h

@@ -141,9 +141,6 @@ class Logger : public CodeEventListener {
   // Emits an event with an int value -> (name, value).
   void IntPtrTEvent(const char* name, intptr_t value);
 
-  // Emits an event with an handle value -> (name, location).
-  void HandleEvent(const char* name, Address* location);
-
   // Emits memory management events for C allocated structures.
   void NewEvent(const char* name, void* object, size_t size);
   void DeleteEvent(const char* name, void* object);