Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/src/runtime-profiler.cc b/src/runtime-profiler.cc
index e17cbb1..b76785d 100644
--- a/src/runtime-profiler.cc
+++ b/src/runtime-profiler.cc
@@ -90,7 +90,8 @@
 
 
 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) {
-  if (FLAG_trace_opt && function->PassesFilter(FLAG_hydrogen_filter)) {
+  if (FLAG_trace_opt &&
+      function->shared()->PassesFilter(FLAG_hydrogen_filter)) {
     PrintF("[marking ");
     function->ShortPrint();
     PrintF(" for recompilation, reason: %s", reason);