[d8] Fix the shared-library build

src/ostreams.h

 // Copyright 2014 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_OSTREAMS_H_
 #define V8_OSTREAMS_H_
 
 #include <cstddef>
 #include <cstdio>
 #include <cstring>
 #include <ostream>  // NOLINT
 #include <streambuf>
 
 #include "include/v8config.h"
 #include "src/base/macros.h"
+#include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 
 class OFStreamBase : public std::streambuf {
  public:
   explicit OFStreamBase(FILE* f);
   virtual ~OFStreamBase();
 
  protected:
   FILE* const f_;
 
   virtual int sync();
   virtual int_type overflow(int_type c);
   virtual std::streamsize xsputn(const char* s, std::streamsize n);
 };
 
 
 // An output stream writing to a file.
-class OFStream : public std::ostream {
+class V8_EXPORT_PRIVATE OFStream : public std::ostream {
  public:
   explicit OFStream(FILE* f);
   virtual ~OFStream();
 
  private:
   OFStreamBase buf_;
 };
 
 
 // Wrappers to disambiguate uint16_t and uc16.
@@ skipping 42 matching lines @@
 // of printable ASCII range.
 std::ostream& operator<<(std::ostream& os, const AsUC32& c);
 
 // Writes the given number to the output in hexadecimal notation.
 std::ostream& operator<<(std::ostream& os, const AsHex& v);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OSTREAMS_H_