[wasm] Introduce WasmStackGuard builtin

src/builtins/builtins-wasm.cc

Index: src/builtins/builtins-wasm.cc
diff --git a/src/builtins/builtins-wasm.cc b/src/builtins/builtins-wasm.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6023948f51d847af4a05024c9bc82915b5b725e0
--- /dev/null
+++ b/src/builtins/builtins-wasm.cc
@@ -0,0 +1,19 @@
+// Copyright 2017 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/builtins/builtins-utils.h"
+#include "src/code-stub-assembler.h"
+
+namespace v8 {
+namespace internal {
+
+typedef compiler::Node Node;
+
+TF_BUILTIN(WasmStackGuard, CodeStubAssembler) {
+  Node* context = SmiConstant(Smi::kZero);
+  TailCallRuntime(Runtime::kWasmStackGuard, context);
+}
+
+}  // namespace internal
+}  // namespace v8