Factor out duplicated GioMemoryFileSnapshotCtor() + NaClAppLoadFile() calls

src/shared/gio/gio.h

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /*
  * NaCl Generic I/O interface.
  */
 
@@ skipping 148 matching lines @@
 
 int GioMemoryFileClose(struct Gio *vself);
 
 void  GioMemoryFileDtor(struct Gio  *vself);
 
 struct GioMemoryFileSnapshot {
   struct GioMemoryFile  base;
 };
 
 int GioMemoryFileSnapshotCtor(struct GioMemoryFileSnapshot  *self,
-                              char                          *fn);
+                              const char                    *filename);
 
 void  GioMemoryFileSnapshotDtor(struct Gio                    *vself);
 
 
 struct GioPio {
   struct Gio  base;
   int         fd;
   off_t       pos;
 };
 
@@ skipping 14 matching lines @@
                char const  *fmt,
                ...);
 
 size_t gvprintf(struct Gio *gp,
                 char const *fmt,
                 va_list    ap);
 
 EXTERN_C_END
 
 #endif  /* NATIVE_CLIENT_SRC_SHARED_GIO_GIO_H_ */