[api] Support sharing prototypes between FunctionTemplates

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 11530 matching lines @@
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(TemplateInfo);
 };
 
 
 class FunctionTemplateInfo: public TemplateInfo {
  public:
   DECL_ACCESSORS(call_code, Object)
   DECL_ACCESSORS(prototype_template, Object)
+  DECL_ACCESSORS(prototype_provider_template, Object)
   DECL_ACCESSORS(parent_template, Object)
   DECL_ACCESSORS(named_property_handler, Object)
   DECL_ACCESSORS(indexed_property_handler, Object)
   DECL_ACCESSORS(instance_template, Object)
   DECL_ACCESSORS(class_name, Object)
   DECL_ACCESSORS(signature, Object)
   DECL_ACCESSORS(instance_call_handler, Object)
   DECL_ACCESSORS(access_check_info, Object)
   DECL_ACCESSORS(shared_function_info, Object)
   DECL_ACCESSORS(js_function, Object)
@@ skipping 17 matching lines @@
 
   DECLARE_CAST(FunctionTemplateInfo)
 
   // Dispatched behavior.
   DECLARE_PRINTER(FunctionTemplateInfo)
   DECLARE_VERIFIER(FunctionTemplateInfo)
 
   static const int kCallCodeOffset = TemplateInfo::kHeaderSize;
   static const int kPrototypeTemplateOffset =
       kCallCodeOffset + kPointerSize;
+  static const int kPrototypeProviderTemplateOffset =
+      kPrototypeTemplateOffset + kPointerSize;
   static const int kParentTemplateOffset =
-      kPrototypeTemplateOffset + kPointerSize;
+      kPrototypeProviderTemplateOffset + kPointerSize;
   static const int kNamedPropertyHandlerOffset =
       kParentTemplateOffset + kPointerSize;
   static const int kIndexedPropertyHandlerOffset =
       kNamedPropertyHandlerOffset + kPointerSize;
   static const int kInstanceTemplateOffset =
       kIndexedPropertyHandlerOffset + kPointerSize;
   static const int kClassNameOffset = kInstanceTemplateOffset + kPointerSize;
   static const int kSignatureOffset = kClassNameOffset + kPointerSize;
   static const int kInstanceCallHandlerOffset = kSignatureOffset + kPointerSize;
   static const int kAccessCheckInfoOffset =
@@ skipping 278 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_