[compiler] Introduce initial StrictEqualStub.

src/code-factory.h

Index: src/code-factory.h
diff --git a/src/code-factory.h b/src/code-factory.h
index fb1a1650538d43189b43d79c0e6e974a03772cab..fcde5d687205310d7f7542ceed65a79626132079 100644
--- a/src/code-factory.h
+++ b/src/code-factory.h
@@ -75,6 +75,8 @@ class CodeFactory final {
   static Callable RegExpConstructResult(Isolate* isolate);
   static Callable RegExpExec(Isolate* isolate);
 
+  static Callable StrictEqual(Isolate* isolate);
+
   static Callable StringAdd(Isolate* isolate, StringAddFlags flags,
                             PretenureFlag pretenure_flag);
   static Callable StringCompare(Isolate* isolate);