[test] Fix test-api.cc test for caching of FunctionTemplate.

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 11438 matching lines @@
   DECL_BOOLEAN_ACCESSORS(accept_any_receiver)
 
   DECL_ACCESSORS(cached_property_name, Object)
 
   DECLARE_CAST(FunctionTemplateInfo)
 
   // Dispatched behavior.
   DECLARE_PRINTER(FunctionTemplateInfo)
   DECLARE_VERIFIER(FunctionTemplateInfo)
 
+  static const int kInvalidSerialNumber = 0;
+
   static const int kCallCodeOffset = TemplateInfo::kHeaderSize;
   static const int kPrototypeTemplateOffset =
       kCallCodeOffset + kPointerSize;
   static const int kPrototypeProviderTemplateOffset =
       kPrototypeTemplateOffset + kPointerSize;
   static const int kParentTemplateOffset =
       kPrototypeProviderTemplateOffset + kPointerSize;
   static const int kNamedPropertyHandlerOffset =
       kParentTemplateOffset + kPointerSize;
   static const int kIndexedPropertyHandlerOffset =
@@ skipping 287 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_