Rework the mime sniffer fuzzer.

net/base/sniff_mime_type_fuzzer.cc

Index: net/base/sniff_mime_type_fuzzer.cc
diff --git a/net/base/sniff_mime_type_fuzzer.cc b/net/base/sniff_mime_type_fuzzer.cc
deleted file mode 100644
index 02fbc1540c7b55516c627f05fa4be0f151b06e87..0000000000000000000000000000000000000000
--- a/net/base/sniff_mime_type_fuzzer.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2016 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 <stddef.h>
-#include <stdint.h>
-
-#include "net/base/mime_sniffer.h"
-#include "url/gurl.h"
-
-// Entry point for LibFuzzer.
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  std::string result;
-  net::SniffMimeType(reinterpret_cast<const char*>(data), size,
-                     GURL("http://www.example-url.com/xyz"), "", &result);
-
-  return 0;
-}