Delete content::MockURLRequestDelegate.

content/test/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 1083 matching lines @@
     "../browser/fileapi/file_system_operation_runner_unittest.cc",
     "../browser/fileapi/file_system_quota_client_unittest.cc",
     "../browser/fileapi/file_system_url_request_job_unittest.cc",
     "../browser/fileapi/file_writer_delegate_unittest.cc",
     "../browser/fileapi/fileapi_message_filter_unittest.cc",
     "../browser/fileapi/local_file_util_unittest.cc",
     "../browser/fileapi/mock_file_change_observer.cc",
     "../browser/fileapi/mock_file_change_observer.h",
     "../browser/fileapi/mock_file_update_observer.cc",
     "../browser/fileapi/mock_file_update_observer.h",
-    "../browser/fileapi/mock_url_request_delegate.cc",
-    "../browser/fileapi/mock_url_request_delegate.h",
     "../browser/fileapi/obfuscated_file_util_unittest.cc",
     "../browser/fileapi/plugin_private_file_system_backend_unittest.cc",
     "../browser/fileapi/recursive_operation_delegate_unittest.cc",
     "../browser/fileapi/sandbox_database_test_helper.cc",
     "../browser/fileapi/sandbox_database_test_helper.h",
     "../browser/fileapi/sandbox_directory_database_unittest.cc",
     "../browser/fileapi/sandbox_file_system_backend_delegate_unittest.cc",
     "../browser/fileapi/sandbox_file_system_backend_unittest.cc",
     "../browser/fileapi/sandbox_origin_database_unittest.cc",
     "../browser/fileapi/transient_file_util_unittest.cc",
@@ skipping 735 matching lines @@
   if (is_android) {
     deps += [ "//testing/android/native_test:native_test_native_code" ]
   }
 }
 
 group("fuzzers") {
   deps = [
     "//content/test/fuzzer",
   ]
 }