Revert of [Tracing] Embed V8 runtime call stats into tracing.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 62b895a8c033d80db21be1508ffe118b8f8fe302..32845124822c61d60be45e9bc4c4acaadc8ae7bb 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -30,7 +30,6 @@
 #include "src/regexp/regexp-stack.h"
 #include "src/runtime-profiler.h"
 #include "src/runtime/runtime.h"
-#include "src/tracing/trace-event.h"
 #include "src/zone.h"
 
 namespace v8 {
@@ -841,9 +840,6 @@
     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() {
@@ -1295,7 +1291,6 @@
   RuntimeProfiler* runtime_profiler_;
   CompilationCache* compilation_cache_;
   Counters* counters_;
-  tracing::TraceEventStatsTable trace_event_stats_table_;
   base::RecursiveMutex break_access_;
   Logger* logger_;
   StackGuard stack_guard_;