AU: Try delta updates first, then full updates

src/platform/update_engine/action_processor.cc

Index: src/platform/update_engine/action_processor.cc
diff --git a/src/platform/update_engine/action_processor.cc b/src/platform/update_engine/action_processor.cc
index 21a88f1d175ac5368c18bb9cb28a1f804b7c768b..d58b5ee39b1cbeb925600aef4a4202c8290666ac 100644
--- a/src/platform/update_engine/action_processor.cc
+++ b/src/platform/update_engine/action_processor.cc
@@ -3,9 +3,12 @@
 // found in the LICENSE file.
 
 #include "update_engine/action_processor.h"
+#include <string>
 #include "chromeos/obsolete_logging.h"
 #include "update_engine/action.h"
 
+using std::string;
+
 namespace chromeos_update_engine {
 
 ActionProcessor::ActionProcessor()
@@ -70,7 +73,7 @@ void ActionProcessor::ActionComplete(AbstractAction* actionptr,
     LOG(INFO) << "ActionProcessor::ActionComplete: finished last action of"
                  " type " << old_type;
     if (delegate_) {
-      delegate_->ProcessingDone(this);
+      delegate_->ProcessingDone(this, success);
     }
     return;
   }