AU: Beginnings of delta support

src/platform/update_engine/update_check_action.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 UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__
-#define UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__
+#ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__
+#define CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 
 #include <string>
 
 #include <curl/curl.h>
 
 #include "base/scoped_ptr.h"
@@ skipping 69 matching lines @@
   bool prompt;
 };
 COMPILE_ASSERT(sizeof(off_t) == 8, off_t_not_64bit);
 
 class UpdateCheckAction;
 class NoneType;
 
 template<>
 class ActionTraits<UpdateCheckAction> {
  public:
-  // Does not take an object for input
-  typedef NoneType InputObjectType;
+  // Takes parameters on the input pipe
+  typedef UpdateCheckParams InputObjectType;
   // On success, puts the output path on output
   typedef UpdateCheckResponse OutputObjectType;
 };
 
 class UpdateCheckAction : public Action<UpdateCheckAction>,
                           public HttpFetcherDelegate {
  public:
   // The ctor takes in all the parameters that will be used for
   // making the request to Omaha. For some of them we have constants
   // that should be used.
   // Takes ownership of the passed in HttpFetcher. Useful for testing.
   // A good calling pattern is:
   // UpdateCheckAction(..., new WhateverHttpFetcher);
-  UpdateCheckAction(const UpdateCheckParams& params,
-                    HttpFetcher* http_fetcher);
+  UpdateCheckAction(HttpFetcher* http_fetcher);
   virtual ~UpdateCheckAction();
   typedef ActionTraits<UpdateCheckAction>::InputObjectType InputObjectType;
   typedef ActionTraits<UpdateCheckAction>::OutputObjectType OutputObjectType;
   void PerformAction();
   void TerminateProcessing();
 
   // Debugging/logging
-  std::string Type() const { return "UpdateCheckAction"; }
+  static std::string StaticType() { return "UpdateCheckAction"; }
+  std::string Type() const { return StaticType(); }
 
   // Delegate methods (see http_fetcher.h)
   virtual void ReceivedBytes(HttpFetcher *fetcher,
                              const char* bytes, int length);
   virtual void TransferComplete(HttpFetcher *fetcher, bool successful);
 
  private:
   // These are data that are passed in the request to the Omaha server
   UpdateCheckParams params_;
 
   // pointer to the HttpFetcher that does the http work
   scoped_ptr<HttpFetcher> http_fetcher_;
 
   // Stores the response from the omaha server
   std::vector<char> response_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateCheckAction);
 };
 
 }  // namespace chromeos_update_engine
 
-#endif  // UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__
+#endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_CHECK_ACTION_H__