Pretenure code generation corner case with new space COW arrays.

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 60727d952abc8382b1f6a4a77f5e433b28a46489..b06d3c8c49e4b6ef751082b9448eaa02f38220a9 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -887,6 +887,14 @@ Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
 }
 
 
+Handle<FixedArray> Factory::CopyAndTenureFixedCOWArray(
+    Handle<FixedArray> array) {
+  CALL_HEAP_FUNCTION(isolate(),
+                     isolate()->heap()->CopyAndTenureFixedCOWArray(*array),
+                     FixedArray);
+}
+
+
 Handle<FixedArray> Factory::CopySizeFixedArray(Handle<FixedArray> array,
                                                int new_length,
                                                PretenureFlag pretenure) {