Remove several unneeded includes from mojo/edk/test_utils.h.

mojo/edk/test/test_utils_posix.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/test/test_utils.h"
 
 #include <fcntl.h>
+#include <stdio.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 
 namespace mojo {
 namespace test {
 
 bool BlockingWrite(const embedder::PlatformHandle& handle,
                    const void* buffer,
@@ skipping 65 matching lines @@
 util::ScopedFILE FILEFromPlatformHandle(embedder::ScopedPlatformHandle h,
                                         const char* mode) {
   CHECK(h.is_valid());
   util::ScopedFILE rv(fdopen(h.release().fd, mode));
   PCHECK(rv) << "fdopen";
   return rv.Pass();
 }
 
 }  // namespace test
 }  // namespace mojo