[RuntimeCallStats] Move tracing runtime instrumentation closer to the original version.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index e624f1456e119edf7a143fcd9ffd3f3506af625c..0ec6b24eeb3087e47d3cb52994acc63684a255c9 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -23,7 +23,6 @@
 #include "src/messages.h"
 #include "src/regexp/regexp-stack.h"
 #include "src/runtime/runtime.h"
-#include "src/tracing/trace-event.h"
 #include "src/zone.h"
 
 namespace v8 {
@@ -843,9 +842,6 @@ class Isolate {
     DCHECK(counters_ != NULL);
     return counters_;
   }
-  tracing::TraceEventStatsTable* trace_event_stats_table() {
-    return &trace_event_stats_table_;
-  }
   RuntimeProfiler* runtime_profiler() { return runtime_profiler_; }
   CompilationCache* compilation_cache() { return compilation_cache_; }
   Logger* logger() {
@@ -1304,7 +1300,6 @@ class Isolate {
   RuntimeProfiler* runtime_profiler_;
   CompilationCache* compilation_cache_;
   Counters* counters_;
-  tracing::TraceEventStatsTable trace_event_stats_table_;
   base::RecursiveMutex break_access_;
   Logger* logger_;
   StackGuard stack_guard_;