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

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 34d4c35061b7ef0e135fb1533c5f0aff09c1347a..b3a4205b3f6bc8b3837f0f38cbcd1bf874131a7b 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -175,7 +175,7 @@ namespace internal {
   V(Code, js_entry_code, JsEntryCode)                                          \
   V(Code, js_construct_entry_code, JsConstructEntryCode)                       \
   V(FixedArray, natives_source_cache, NativesSourceCache)                      \
-  V(Object, last_script_id, LastScriptId)                                      \
+  V(Smi, last_script_id, LastScriptId)                                         \
   V(Script, empty_script, EmptyScript)                                         \
   V(Smi, real_stack_limit, RealStackLimit)                                     \
   V(NameDictionary, intrinsic_function_names, IntrinsicFunctionNames)        \
@@ -1440,9 +1440,6 @@ class Heap {
     roots_[kStoreBufferTopRootIndex] = reinterpret_cast<Smi*>(top);
   }
 
-  // Update the next script id.
-  inline void SetLastScriptId(Object* last_script_id);
-
   // Generated code can embed this address to get access to the roots.
   Object** roots_array_start() { return roots_; }