Use UtilityProcessHost to patch files.

chrome/browser/component_updater/component_updater_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 12 matching lines @@
 class URLRequest;
 }
 
 namespace content {
 class ResourceThrottle;
 }
 
 namespace component_updater {
 
 class OnDemandTester;
-class ComponentPatcher;
 
 // Component specific installers must derive from this class and implement
 // OnUpdateError() and Install(). A valid instance of this class must be
 // given to ComponentUpdateService::RegisterComponent().
 class ComponentInstaller {
  public :
   // Called by the component updater on the UI thread when there was a
   // problem unpacking or verifying the component. |error| is a non-zero
   // value which is only meaningful to the component updater.
   virtual void OnUpdateError(int error) = 0;
@@ skipping 122 matching lines @@
     // pings are disabled.
     virtual GURL PingUrl() = 0;
     // Parameters added to each url request. It can be null if none are needed.
     virtual std::string ExtraRequestParams() = 0;
     // How big each update request can be. Don't go above 2000.
     virtual size_t UrlSizeLimit() = 0;
     // The source of contexts for all the url requests.
     virtual net::URLRequestContextGetter* RequestContext() = 0;
     // True means that all ops are performed in this process.
     virtual bool InProcess() = 0;
-    // Creates a new ComponentPatcher in a platform-specific way. This is useful
-    // for dependency injection.
-    virtual ComponentPatcher* CreateComponentPatcher() = 0;
     // True means that this client can handle delta updates.
     virtual bool DeltasEnabled() const = 0;
     // True means that the background downloader can be used for downloading
     // non on-demand components.
     virtual bool UseBackgroundDownloader() const = 0;
   };
 
   // Start doing update checks and installing new versions of registered
   // components after Configurator::InitialDelay() seconds.
   virtual Status Start() = 0;
@@ skipping 31 matching lines @@
 };
 
 // Creates the component updater. You must pass a valid |config| allocated on
 // the heap which the component updater will own.
 ComponentUpdateService* ComponentUpdateServiceFactory(
     ComponentUpdateService::Configurator* config);
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_