[turbofan] Use FastCloneShallow[Array|Object]Stub if possible.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 60361da80322831faf24d97967377f1abc1f8617..3cd42717ac4ddceb492c6765368b59b389898ebc 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -143,6 +143,21 @@ Callable CodeFactory::StringAdd(Isolate* isolate, StringAddFlags flags,
 
 
 // static
+Callable CodeFactory::FastCloneShallowArray(Isolate* isolate) {
+  // TODO(mstarzinger): Thread through AllocationSiteMode at some point.
+  FastCloneShallowArrayStub stub(isolate, DONT_TRACK_ALLOCATION_SITE);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+
+// static
+Callable CodeFactory::FastCloneShallowObject(Isolate* isolate, int length) {
+  FastCloneShallowObjectStub stub(isolate, length);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+
+// static
 Callable CodeFactory::AllocateHeapNumber(Isolate* isolate) {
   AllocateHeapNumberStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());