Don't allocate a new handle unnecessarily

runtime/vm/profiler_service.cc

Index: runtime/vm/profiler_service.cc
diff --git a/runtime/vm/profiler_service.cc b/runtime/vm/profiler_service.cc
index 5c3efa6790a01c34b13df37fd3b6550c9df130ce..c0ac69d47b2166490ad000d93c1bdebaa5be0c2d 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -2539,7 +2539,7 @@ const char* ProfileTrieWalker::CurrentToken() {
     return NULL;
   }
   ProfileFunction* func = profile_->GetFunction(current_->table_index());
-  const Function& function = Function::Handle(func->function()->raw());
+  const Function& function = *(func->function());
   if (function.IsNull()) {
     // No function.
     return NULL;