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

test/cctest/test-code-stub-assembler.cc

Index: test/cctest/test-code-stub-assembler.cc
diff --git a/test/cctest/test-code-stub-assembler.cc b/test/cctest/test-code-stub-assembler.cc
index 80bc83071df1a578b096cc7b30c3416153703e72..588f4301315af2560cb315b3b38a6c29e9f990f8 100644
--- a/test/cctest/test-code-stub-assembler.cc
+++ b/test/cctest/test-code-stub-assembler.cc
@@ -173,7 +173,7 @@ TEST(TryToName) {
 
   {
     // TryToName(<zero smi>) => if_keyisindex: smi value.
-    Handle<Object> key(Smi::kZero, isolate);
+    Handle<Object> key(Smi::FromInt(0), isolate);
     ft.CheckTrue(key, expect_index, key);
   }
 
@@ -944,7 +944,7 @@ TEST(TryLookupElement) {
   FunctionTester ft(code, kNumParams);
 
   Factory* factory = isolate->factory();
-  Handle<Object> smi0(Smi::kZero, isolate);
+  Handle<Object> smi0(Smi::FromInt(0), isolate);
   Handle<Object> smi1(Smi::FromInt(1), isolate);
   Handle<Object> smi7(Smi::FromInt(7), isolate);
   Handle<Object> smi13(Smi::FromInt(13), isolate);