Fix Windows build

src/extensions/statistics-extension.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 40 matching lines @@
 }
 
 static void AddNumber(v8::Local<v8::Object> object,
                       intptr_t value,
                       const char* name) {
   object->Set(v8::String::New(name),
               v8::Number::New(static_cast<double>(value)));
 }
 
 
+static void AddNumber64(v8::Local<v8::Object> object,
+                        int64_t value,
+                        const char* name) {
+  object->Set(v8::String::New(name),
+              v8::Number::New(static_cast<double>(value)));
+}
+
+
 void StatisticsExtension::GetCounters(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   Isolate* isolate = reinterpret_cast<Isolate*>(args.GetIsolate());
   Heap* heap = isolate->heap();
 
   if (args.Length() > 0) {  // GC if first argument evaluates to true.
     if (args[0]->IsBoolean() && args[0]->ToBoolean()->Value()) {
       heap->CollectAllGarbage(Heap::kNoGCFlags, "counters extension");
     }
   }
@@ skipping 67 matching lines @@
   AddNumber(result, heap->property_cell_space()->Available(),
             "property_cell_space_available_bytes");
   AddNumber(result, heap->property_cell_space()->CommittedMemory(),
             "property_cell_space_commited_bytes");
   AddNumber(result, heap->lo_space()->Size(),
             "lo_space_live_bytes");
   AddNumber(result, heap->lo_space()->Available(),
             "lo_space_available_bytes");
   AddNumber(result, heap->lo_space()->CommittedMemory(),
             "lo_space_commited_bytes");
-  AddNumber(result, heap->amount_of_external_allocated_memory(),
-            "amount_of_external_allocated_memory");
+  AddNumber64(result, heap->amount_of_external_allocated_memory(),
+              "amount_of_external_allocated_memory");
   args.GetReturnValue().Set(result);
 }
 
 
 void StatisticsExtension::Register() {
   static StatisticsExtension statistics_extension;
   static v8::DeclareExtension declaration(&statistics_extension);
 }
 
 } }  // namespace v8::internal