Use UtilityProcessHost to patch files.

chrome/browser/component_updater/test/component_updater_service_unittest.cc

 // Copyright 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.
 
 #include "chrome/browser/component_updater/test/component_updater_service_unittest.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ skipping 90 matching lines @@
 
 size_t TestConfigurator::UrlSizeLimit() { return 256; }
 
 net::URLRequestContextGetter* TestConfigurator::RequestContext() {
   return context_.get();
 }
 
 // Don't use the utility process to run code out-of-process.
 bool TestConfigurator::InProcess() { return true; }
 
-ComponentPatcher* TestConfigurator::CreateComponentPatcher() {
-  return new MockComponentPatcher();
-}
-
 bool TestConfigurator::DeltasEnabled() const {
   return true;
 }
 
 bool TestConfigurator::UseBackgroundDownloader() const {
   return false;
 }
 
 // Set how many update checks are called, the default value is just once.
 void TestConfigurator::SetLoopCount(int times) { times_ = times; }
@@ skipping 1278 matching lines @@
   EXPECT_EQ(1, post_interceptor_->GetHitCount());
   EXPECT_EQ(0, static_cast<TestInstaller*>(com.installer)->error());
   EXPECT_EQ(0, static_cast<TestInstaller*>(com.installer)->install_count());
 
   component_updater()->Stop();
 }
 
 
 }  // namespace component_updater