Turn ElementsTransitionAndStore stub into a HydrogenCodeStub.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 0c0c2725cbf3e559c11c5a709985559ae3c4d528..11dd02ef6e57f9a1e2543c80d252d86ef1315b75 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -258,6 +258,26 @@ void StoreGlobalStub::InitializeInterfaceDescriptor(
 }
 
 
+void ElementsTransitionAndStoreStub::InitializeInterfaceDescriptor(
+    Isolate* isolate,
+    CodeStubInterfaceDescriptor* descriptor) {
+  static Register registers[] = { rax, rbx, rcx, rdx };
+  descriptor->register_param_count_ = 4;
+  descriptor->register_params_ = registers;
+  switch (strict_mode_) {
+    case kNonStrictMode:
+      descriptor->deoptimization_handler_ = Runtime::FunctionForId(
+          Runtime::kElementsTransitionAndStoreNonStrict)->entry;
+      break;
+
+    case kStrictMode:
+      descriptor->deoptimization_handler_ = Runtime::FunctionForId(
+          Runtime::kElementsTransitionAndStoreStrict)->entry;
+      break;
+  }
+}
+
+
 #define __ ACCESS_MASM(masm)