Add Smi::Zero and replace all Smi::FromInt(0) calls

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 5d0b22fd0c7d12433fe7d1e6d2e5ab84e9ff7752..6706d6431ac7e2cb38e5343a0da7d94f21cb7b02 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1320,7 +1320,7 @@ MaybeHandle<JSArray> Compiler::CompileForLiveEdit(Handle<Script> script) {
   // generated shared function infos, clear the script's list temporarily
   // and restore it at the end of this method.
   Handle<Object> old_function_infos(script->shared_function_infos(), isolate);
-  script->set_shared_function_infos(Smi::FromInt(0));
+  script->set_shared_function_infos(Smi::kZero);
 
   // Start a compilation.
   Zone zone(isolate->allocator());