[turbofan] Specialize to (optimization time) known TypedArray instances.

src/compiler/js-native-context-specialization.h

Index: src/compiler/js-native-context-specialization.h
diff --git a/src/compiler/js-native-context-specialization.h b/src/compiler/js-native-context-specialization.h
index 110087db126502a903ace378c6d8d4a4bb0b4a11..5280b090673036f92f1afa4470ec25b10487d27c 100644
--- a/src/compiler/js-native-context-specialization.h
+++ b/src/compiler/js-native-context-specialization.h
@@ -115,6 +115,9 @@ class JSNativeContextSpecialization final : public AdvancedReducer {
                                         AccessMode access_mode,
                                         KeyedAccessStoreMode store_mode);
 
+  // Construct an appropriate heap object check.
+  Node* BuildCheckHeapObject(Node* receiver, Node** effect, Node* control);
+
   // Construct an appropriate map check.
   Node* BuildCheckMaps(Node* receiver, Node* effect, Node* control,
                        std::vector<Handle<Map>> const& maps);