Add %_IncrementStatsCounter intrinsic.

src/runtime/runtime-internal.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug.h"
 #include "src/messages.h"
@@ skipping 300 matching lines @@
 }
 
 
 RUNTIME_FUNCTION(Runtime_GetFromCache) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_SMI_ARG_CHECKED(id, 0);
   args[0] = isolate->native_context()->jsfunction_result_caches()->get(id);
   return __RT_impl_Runtime_GetFromCacheRT(args, isolate);
 }
+
+
+RUNTIME_FUNCTION(Runtime_IncrementStatsCounter) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_CHECKED(String, name, 0);
+
+  if (FLAG_native_code_counters) {
+    StatsCounter(isolate, name->ToCString().get()).Increment();
+  }
+  return isolate->heap()->undefined_value();
+}
 }
 }  // namespace v8::internal