AU: Try delta updates first, then full updates

src/platform/update_engine/action_processor.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_ACTION_PROCESSOR_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_ACTION_PROCESSOR_H__
 
 #include <deque>
 
 #include "base/basictypes.h"
@@ skipping 60 matching lines @@
   ActionProcessorDelegate *delegate_;
   DISALLOW_COPY_AND_ASSIGN(ActionProcessor);
 };
 
 // A delegate object can be used to be notified of events that happen
 // in an ActionProcessor. An instance of this class can be passed to an
 // ActionProcessor to register itself.
 class ActionProcessorDelegate {
  public:
   // Called when all processing in an ActionProcessor has completed. A pointer
-  // to the ActionProcessor is passed.
-  virtual void ProcessingDone(const ActionProcessor* processor) {}
+  // to the ActionProcessor is passed. success is true iff all actions
+  // completed successfully
+  virtual void ProcessingDone(const ActionProcessor* processor, bool success) {}
 
   // Called when processing has stopped. Does not mean that all Actions have
   // completed. If/when all Actions complete, ProcessingDone() will be called.
   virtual void ProcessingStopped(const ActionProcessor* processor) {}
 
   // Called whenever an action has finished processing, either successfully
   // or otherwise.
   virtual void ActionCompleted(ActionProcessor* processor,
                                AbstractAction* action,
                                bool success) {}
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_ACTION_PROCESSOR_H__