[perf-prof] Fix erroneous code offsets in unwinding info

src/perf-jit.cc

Index: src/perf-jit.cc
diff --git a/src/perf-jit.cc b/src/perf-jit.cc
index e7e4c344cd280c2b70725805b7831fa1112fa02d..86f4c4d9b4ff301b1925991ae2005a646eeabadd 100644
--- a/src/perf-jit.cc
+++ b/src/perf-jit.cc
@@ -218,6 +218,9 @@ void PerfJitLogger::LogRecordedBuffer(AbstractCode* abstract_code,
 
   const char* code_name = name;
   uint8_t* code_pointer = reinterpret_cast<uint8_t*>(code->instruction_start());
+  // Code generated by Crankshaft or Turbofan will have the safepoint table
+  // directly after instructions. There is no need to record the safepoint table
+  // itself.
   uint32_t code_size = code->is_crankshafted() ? code->safepoint_table_offset()
                                                : code->instruction_size();