AU: Beginnings of delta support

- proto file for delta files; still needs hardlink support

- code to generate a delta update from two directory trees (old, new).

- code to parse delta update

- Actions: postinst-runner, install, bootable flag setter, filesystem
 copier, Omaha response handler, Omaha request preparer,

- misc utility functions, like StringHasSuffix(), templatized Action
 classes to feed/collect an object from another action.

- FilesystemIterator: iterates a directory tree with optional
 exclusion path. Tolerates deleting of files during iteration.

- Subprocess class: support for synchronously or asynchronously
 running an external command. Doesn't pass any env variables.

- Integration test that strings many Actions together and tests using
 actual Omaha/Lorry. Currently only tests full updates.

- New simple HTTP server for unittest that supports fake flaky
 connections.

- Some refactoring.

Review URL: http://codereview.chromium.org/466036


git-svn-id: svn://chrome-svn/chromeos/trunk@334 06c00378-0e64-4dae-be16-12b19f9950a1
diff --git a/mock_file_writer.h b/mock_file_writer.h
index e6d1612..7cf0fd5 100644
--- a/mock_file_writer.h
+++ b/mock_file_writer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UPDATE_ENGINE_MOCK_FILE_WRITER_H__
-#define UPDATE_ENGINE_MOCK_FILE_WRITER_H__
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_FILE_WRITER_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_FILE_WRITER_H__
 
 #include "base/basictypes.h"
 #include "update_engine/file_writer.h"
@@ -56,4 +56,4 @@
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_MOCK_FILE_WRITER_H__
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_MOCK_FILE_WRITER_H__