Fix disassembly redirection from stdout into a file.

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 <stddef.h>
 #include <stdio.h>
 #include <string.h>
@@ skipping 99 matching lines @@
   virtual OFStream& write(const char* s, size_t n) V8_OVERRIDE;
   virtual OFStream& flush() V8_OVERRIDE;
 
  private:
   FILE* const f_;
 
   DISALLOW_COPY_AND_ASSIGN(OFStream);
 };
 
 
-// A wrapper to disambiguate uint16_t and uc16.
+// Wrappers to disambiguate uint16_t and uc16.
 struct AsUC16 {
   explicit AsUC16(uint16_t v) : value(v) {}
   uint16_t value;
 };
 
 
+struct AsReversiblyEscapedUC16 {
+  explicit AsReversiblyEscapedUC16(uint16_t v) : value(v) {}
+  uint16_t value;
+};
+
+
+// Writes the given character to the output escaping everything outside
+// of printable ASCII range. Additionally escapes '\' making escaping
+// reversible.
+OStream& operator<<(OStream& os, const AsReversiblyEscapedUC16& c);
+
+// Writes the given character to the output escaping everything outside
+// of printable ASCII range.
 OStream& operator<<(OStream& os, const AsUC16& c);
 } }  // namespace v8::internal
 
 #endif  // V8_OSTREAMS_H_