Split the TRACE_EVENTs from the LOG/HistogramTimers/TimerEvents functionality.

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index 16795519988e26d3b66490d160ff7d68a7508238..a77c1783626e932967eb10a46e43d0c36a9b266e 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -14,6 +14,7 @@
 #include "src/interpreter/interpreter.h"
 #include "src/macro-assembler.h"
 #include "src/profiler/cpu-profiler.h"
+#include "src/tracing/trace-event.h"
 #include "src/v8.h"
 
 
@@ -372,6 +373,7 @@ void Deoptimizer::DeoptimizeMarkedCodeForContext(Context* context) {
 
 void Deoptimizer::DeoptimizeAll(Isolate* isolate) {
   TimerEventScope<TimerEventDeoptimizeCode> timer(isolate);
+  TRACE_EVENT0("v8", "V8.DeoptimizeCode");
   if (FLAG_trace_deopt) {
     CodeTracer::Scope scope(isolate->GetCodeTracer());
     PrintF(scope.file(), "[deoptimize all code in all contexts]\n");
@@ -390,6 +392,7 @@ void Deoptimizer::DeoptimizeAll(Isolate* isolate) {
 
 void Deoptimizer::DeoptimizeMarkedCode(Isolate* isolate) {
   TimerEventScope<TimerEventDeoptimizeCode> timer(isolate);
+  TRACE_EVENT0("v8", "V8.DeoptimizeCode");
   if (FLAG_trace_deopt) {
     CodeTracer::Scope scope(isolate->GetCodeTracer());
     PrintF(scope.file(), "[deoptimize marked code in all contexts]\n");
@@ -418,6 +421,7 @@ void Deoptimizer::MarkAllCodeForContext(Context* context) {
 
 void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   TimerEventScope<TimerEventDeoptimizeCode> timer(function->GetIsolate());
+  TRACE_EVENT0("v8", "V8.DeoptimizeCode");
   Code* code = function->code();
   if (code->kind() == Code::OPTIMIZED_FUNCTION) {
     // Mark the code for deoptimization and unlink any functions that also