Sandbox the component updater's patcher utility process.

chrome/utility/chrome_content_utility_client.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 CHROME_UTILITY_CHROME_CONTENT_UTILITY_CLIENT_H_
 #define CHROME_UTILITY_CHROME_CONTENT_UTILITY_CLIENT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 32 matching lines @@
 
  private:
   // IPC message handlers.
   void OnUnpackWebResource(const std::string& resource_data);
 #if defined(OS_CHROMEOS)
   void OnCreateZipFile(const base::FilePath& src_dir,
                        const std::vector<base::FilePath>& src_relative_paths,
                        const base::FileDescriptor& dest_fd);
 #endif  // defined(OS_CHROMEOS)
 
-  void OnPatchFileBsdiff(const base::FilePath& input_file,
-                         const base::FilePath& patch_file,
-                         const base::FilePath& output_file);
-  void OnPatchFileCourgette(const base::FilePath& input_file,
-                            const base::FilePath& patch_file,
-                            const base::FilePath& output_file);
+  void OnPatchFileBsdiff(const IPC::PlatformFileForTransit& input_file,
+                         const IPC::PlatformFileForTransit& patch_file,
+                         const IPC::PlatformFileForTransit& output_file);
+  void OnPatchFileCourgette(const IPC::PlatformFileForTransit& input_file,
+                            const IPC::PlatformFileForTransit& patch_file,
+                            const IPC::PlatformFileForTransit& output_file);
   void OnStartupPing();
 #if defined(FULL_SAFE_BROWSING)
   void OnAnalyzeZipFileForDownloadProtection(
       const IPC::PlatformFileForTransit& zip_file,
       const IPC::PlatformFileForTransit& temp_file);
 #if defined(OS_MACOSX)
   void OnAnalyzeDmgFileForDownloadProtection(
       const IPC::PlatformFileForTransit& dmg_file);
 #endif  // defined(OS_MACOSX)
 #endif  // defined(FULL_SAFE_BROWSING)
 
   typedef ScopedVector<UtilityMessageHandler> Handlers;
   Handlers handlers_;
 
   // Flag to enable whitelisting.
   bool filter_messages_;
   // A list of message_ids to filter.
   std::set<int> message_id_whitelist_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentUtilityClient);
 };
 
 #endif  // CHROME_UTILITY_CHROME_CONTENT_UTILITY_CLIENT_H_