For actions, switch bool success into an exit code.

action_unittest.cc

Index: action_unittest.cc
diff --git a/action_unittest.cc b/action_unittest.cc
index 8dd9edd52e3986b6af217b87ac795437c846a0a8..8bb94cada0b794ad2a80756ec73f44c3393acb2a 100644
--- a/action_unittest.cc
+++ b/action_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -32,7 +32,7 @@ struct ActionTestAction : public Action<ActionTestAction> {
   void PerformAction() {}
   void CompleteAction() {
     ASSERT_TRUE(processor());
-    processor()->ActionComplete(this, true);
+    processor()->ActionComplete(this, kActionCodeSuccess);
   }
   string Type() const { return "ActionTestAction"; }
 };