Revert of [counters] RuntimeStats: fix wrong bookkeeping when dynamically changing counters.

src/counters-inl.h

Index: src/counters-inl.h
diff --git a/src/counters-inl.h b/src/counters-inl.h
index ce77806cdcfa4d5117da06aae41edcc5bea13e83..7219ef778a6ea6a06ce25ad457b7a1299c5d7194 100644
--- a/src/counters-inl.h
+++ b/src/counters-inl.h
@@ -9,57 +9,6 @@
 
 namespace v8 {
 namespace internal {
-
-void RuntimeCallTimer::Start(RuntimeCallCounter* counter,
-                             RuntimeCallTimer* parent) {
-  DCHECK(!IsStarted());
-  counter_ = counter;
-  parent_.SetValue(parent);
-  if (FLAG_runtime_stats ==
-      v8::tracing::TracingCategoryObserver::ENABLED_BY_SAMPLING) {
-    return;
-  }
-  base::TimeTicks now = Now();
-  if (parent) parent->Pause(now);
-  Resume(now);
-  DCHECK(IsStarted());
-}
-
-void RuntimeCallTimer::Pause(base::TimeTicks now) {
-  DCHECK(IsStarted());
-  elapsed_ += (now - start_ticks_);
-  start_ticks_ = base::TimeTicks();
-}
-
-void RuntimeCallTimer::Resume(base::TimeTicks now) {
-  DCHECK(!IsStarted());
-  start_ticks_ = now;
-}
-
-RuntimeCallTimer* RuntimeCallTimer::Stop() {
-  if (!IsStarted()) return parent();
-  base::TimeTicks now = Now();
-  Pause(now);
-  counter_->Increment();
-  CommitTimeToCounter();
-
-  RuntimeCallTimer* parent_timer = parent();
-  if (parent_timer) {
-    parent_timer->Resume(now);
-  }
-  return parent_timer;
-}
-
-void RuntimeCallTimer::CommitTimeToCounter() {
-  counter_->Add(elapsed_);
-  elapsed_ = base::TimeDelta();
-}
-
-bool RuntimeCallTimer::IsStarted() { return start_ticks_ != base::TimeTicks(); }
-
-base::TimeTicks RuntimeCallTimer::Now() {
-  return base::TimeTicks::HighResolutionNow();
-}
 
 RuntimeCallTimerScope::RuntimeCallTimerScope(
     Isolate* isolate, RuntimeCallStats::CounterId counter_id) {