Adding 'isolates' argument to LOG to get rid of multiple TLS fetches in profiling.

src/top.cc

Index: src/top.cc
diff --git a/src/top.cc b/src/top.cc
index 8414560233666a002ef80ded4d910ff5980254cc..281e54b3d7127c23366a31d8e44b143305a28b12 100644
--- a/src/top.cc
+++ b/src/top.cc
@@ -458,7 +458,7 @@ bool Isolate::MayNamedAccess(JSObject* receiver, Object* key,
   Handle<JSObject> receiver_handle(receiver, this);
   Handle<Object> key_handle(key, this);
   Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
-  LOG(ApiNamedSecurityCheck(key));
+  LOG(this,ApiNamedSecurityCheck(key));
   bool result = false;
   {
     // Leaving JavaScript.
@@ -500,7 +500,7 @@ bool Isolate::MayIndexedAccess(JSObject* receiver,
   HandleScope scope(this);
   Handle<JSObject> receiver_handle(receiver, this);
   Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
-  LOG(ApiIndexedSecurityCheck(index));
+  LOG(this,ApiIndexedSecurityCheck(index));
   bool result = false;
   {
     // Leaving JavaScript.