Added %NeverOptimize runtime call that can disable optimizations for a method for tests.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 096c4e3356a9548c99bac1bed77a9460cbdbd110..6592a7dcaefc453409ccdbc69693d8e83a902c28 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7526,6 +7526,14 @@ void HOptimizedGraphBuilder::VisitCallRuntime(CallRuntime* expr) {
 
   const Runtime::Function* function = expr->function();
   ASSERT(function != NULL);
+
+  if (static_cast<int>(function->function_id)
+      == static_cast<int>(Runtime::kNeverOptimize)
+      && expr->arguments()->length() == 0) {
+    // %NeverOptimize() without arguments marks the caller as never optimize.
+    return Bailout("function marked itself as never optimize");
+  }
+
   if (function->intrinsic_type == Runtime::INLINE) {
     ASSERT(expr->name()->length() > 0);
     ASSERT(expr->name()->Get(0) == '_');