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

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index 5c7f13faf1439bdd2327e623ead0e6bdbbd2b01f..e22489f2ac2688c6edc76323d2749c9854dea2bb 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -197,15 +197,15 @@ class ProfilerEventsProcessor : public Thread {
 } }  // namespace v8::internal
 
 
-#define PROFILE(Call)                                  \
-  LOG(Call);                                           \
+#define PROFILE(isolate,Call)                          \
+  LOG(isolate,Call);                                   \
   do {                                                 \
     if (v8::internal::CpuProfiler::is_profiling()) {   \
       v8::internal::CpuProfiler::Call;                 \
     }                                                  \
   } while (false)
 #else
-#define PROFILE(Call) LOG(Call)
+#define PROFILE(isolate,Call) LOG(isolate,Call)
 #endif  // ENABLE_LOGGING_AND_PROFILING