Remove declaration of GetCertificateMimeTypeForMimeType.

components/mime_util/mime_util.cc

 // Copyright 2015 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 "components/mime_util/mime_util.h"
 
 #include <stddef.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
+#include "net/base/mime_util.h"
 
 #if !defined(OS_IOS)
 // iOS doesn't use and must not depend on //media
 #include "media/base/mime_util.h"
 #endif
 
 namespace mime_util {
 
 namespace {
 
@@ skipping 168 matching lines @@
 
 bool IsSupportedJavascriptMimeType(const std::string& mime_type) {
   return g_mime_util.Get().IsSupportedJavascriptMimeType(mime_type);
 }
 
 bool IsSupportedMimeType(const std::string& mime_type) {
   return g_mime_util.Get().IsSupportedMimeType(mime_type);
 }
 
 }  // namespace mime_util