CPUProfiler: It is not clear why we are using Handle<Object> for scriptId. Lets flip it into Smi/in…

src/heap-inl.h

Index: src/heap-inl.h
diff --git a/src/heap-inl.h b/src/heap-inl.h
index 2d0968d34195d7ab6a2f1c87f2518323facf55b4..b9dbf45cfdec1fe694a1859cfa5524d102d14ec2 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -570,8 +570,8 @@ intptr_t Heap::AdjustAmountOfExternalAllocatedMemory(
 }
 
 
-void Heap::SetLastScriptId(Object* last_script_id) {
-  roots_[kLastScriptIdRootIndex] = last_script_id;
+void Heap::SetLastScriptId(int last_script_id) {
+  roots_[kLastScriptIdRootIndex] = Smi::FromInt(last_script_id);
 }