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

src/runtime/runtime-compiler.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/asmjs/asm-js.h"
 #include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
 #include "src/compiler.h"
@@ skipping 105 matching lines @@
   }
   function->shared()->set_is_asm_wasm_broken(true);
   DCHECK(function->code() ==
          isolate->builtins()->builtin(Builtins::kInstantiateAsmJs));
   function->ReplaceCode(isolate->builtins()->builtin(Builtins::kCompileLazy));
   if (function->shared()->code() ==
       isolate->builtins()->builtin(Builtins::kInstantiateAsmJs)) {
     function->shared()->ReplaceCode(
         isolate->builtins()->builtin(Builtins::kCompileLazy));
   }
-  return Smi::FromInt(0);
+  return Smi::kZero;
 }
 
 RUNTIME_FUNCTION(Runtime_NotifyStubFailure) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
   Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
   DCHECK(AllowHeapAllocation::IsAllowed());
   delete deoptimizer;
   return isolate->heap()->undefined_value();
 }
@@ skipping 346 matching lines @@
   DCHECK(is_valid_language_mode(args.smi_at(3)));
   LanguageMode language_mode = static_cast<LanguageMode>(args.smi_at(3));
   DCHECK(args[4]->IsSmi());
   Handle<SharedFunctionInfo> outer_info(args.at<JSFunction>(2)->shared(),
                                         isolate);
   return CompileGlobalEval(isolate, args.at<String>(1), outer_info,
                            language_mode, args.smi_at(4), args.smi_at(5));
 }
 }  // namespace internal
 }  // namespace v8