Fixed a known issue in D8 (read file), enabled D8 shared library build on Windows.

include/v8.h

 // Copyright 2011 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 3588 matching lines @@
 
   /**
    * Returns whether or not the locker for a given isolate, or default isolate if NULL is given,
    * is locked by the current thread.
    */
   static bool IsLocked(Isolate* isolate = NULL);
 
   /**
    * Returns whether v8::Locker is being used by this V8 instance.
    */
-  static bool IsActive() { return active_; }
+  static bool IsActive();
 
  private:
   bool has_lock_;
   bool top_level_;
   internal::Isolate* isolate_;
 
   static bool active_;
 
   // Disallow copying and assigning.
   Locker(const Locker&);
@@ skipping 581 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_