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/action_processor_unittest.cc b/action_processor_unittest.cc
index 2a80bc3..6130585 100644
--- a/action_processor_unittest.cc
+++ b/action_processor_unittest.cc
@@ -70,8 +70,8 @@
     EXPECT_FALSE(processing_stopped_called_);
     processing_stopped_called_ = true;
   }
-  virtual void ActionCompleted(const ActionProcessor* processor,
-                               const AbstractAction* action,
+  virtual void ActionCompleted(ActionProcessor* processor,
+                               AbstractAction* action,
                                bool success) {
     EXPECT_EQ(processor_, processor);
     EXPECT_FALSE(action_completed_called_);