Adding missing V8_EXPORT flag in SpaceStatistics class in v8.h

include/v8.h

 // Copyright 2012 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 4883 matching lines @@
   size_t total_heap_size_executable_;
   size_t total_physical_size_;
   size_t used_heap_size_;
   size_t heap_size_limit_;
 
   friend class V8;
   friend class Isolate;
 };
 
 
-class HeapSpaceStatistics {
+class V8_EXPORT HeapSpaceStatistics {
  public:
   HeapSpaceStatistics();
   const char* space_name() { return space_name_; }
   size_t space_size() { return space_size_; }
   size_t space_used_size() { return space_used_size_; }
   size_t space_available_size() { return space_available_size_; }
   size_t physical_space_size() { return physical_space_size_; }
 
  private:
   const char* space_name_;
@@ skipping 3216 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_