[stubs] Introduce LeftShift, SignedRightShift and UnsignedRightShift stubs.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 9a907ffffc32f4eb2041466006e1a2665cdb7f4c..20d30b7f728055cef8e9b24e694d474e7ba98829 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -240,6 +240,24 @@ Callable CodeFactory::Modulus(Isolate* isolate) {
 }
 
 // static
+Callable CodeFactory::SignedRightShift(Isolate* isolate) {
+  SignedRightShiftStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+// static
+Callable CodeFactory::UnsignedRightShift(Isolate* isolate) {
+  UnsignedRightShiftStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+// static
+Callable CodeFactory::LeftShift(Isolate* isolate) {
+  LeftShiftStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+// static
 Callable CodeFactory::BitwiseAnd(Isolate* isolate) {
   BitwiseAndStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());