Use UtilityProcessHost to patch files.

chrome/browser/component_updater/component_updater_service.h

Index: chrome/browser/component_updater/component_updater_service.h
diff --git a/chrome/browser/component_updater/component_updater_service.h b/chrome/browser/component_updater/component_updater_service.h
index a53866fc04276afb48761cdc2883ddc44a232d91..1a3dc521c62d5da742ff2b22d36dbcbb326f3fb9 100644
--- a/chrome/browser/component_updater/component_updater_service.h
+++ b/chrome/browser/component_updater/component_updater_service.h
@@ -30,7 +30,6 @@ 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
@@ -173,9 +172,6 @@ class ComponentUpdateService {
     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