Android: Remove unneeded RegisterNatives() calls

base/test/test_file_util.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_TEST_TEST_FILE_UTIL_H_
 #define BASE_TEST_TEST_FILE_UTIL_H_
 
 // File utility functions used only by tests.
 
 #include <stddef.h>
@@ skipping 52 matching lines @@
 
  private:
   const FilePath path_;
   void* info_;  // The opaque stored permission information.
   size_t length_;  // The length of the stored permission information.
 
   DISALLOW_COPY_AND_ASSIGN(FilePermissionRestorer);
 };
 
 #if defined(OS_ANDROID)
-// Register the ContentUriTestUrils JNI bindings.
-bool RegisterContentUriTestUtils(JNIEnv* env);
-
 // Insert an image file into the MediaStore, and retrieve the content URI for
 // testing purpose.
 FilePath InsertImageIntoMediaStore(const FilePath& path);
 #endif  // defined(OS_ANDROID)
 
 }  // namespace base
 
 #endif  // BASE_TEST_TEST_FILE_UTIL_H_