AU: delta compress the kernel partition

src/platform/update_engine/download_action_unittest.cc

 // 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.
 
 #include <string>
 #include <vector>
 #include <glib.h>
 #include <gtest/gtest.h>
 #include "update_engine/action_pipe.h"
 #include "update_engine/download_action.h"
@@ skipping 156 matching lines @@
     processor.EnqueueAction(&feeder_action);
     processor.EnqueueAction(&download_action);
     BondActions(&feeder_action, &download_action);
 
     g_timeout_add(0, &TerminateEarlyTestStarter, &processor);
     g_main_loop_run(loop);
     g_main_loop_unref(loop);
   }
 
   // 1 or 0 chunks should have come through
-  const off_t resulting_file_size(FileSize(path));
+  const off_t resulting_file_size(utils::FileSize(path));
   if (resulting_file_size != 0)
     EXPECT_EQ(kMockHttpFetcherChunkSize, resulting_file_size);
 }
 
 class DownloadActionTestAction;
 
 template<>
 class ActionTraits<DownloadActionTestAction> {
  public:
   typedef InstallPlan OutputObjectType;
@@ skipping 86 matching lines @@
   ActionProcessor processor;
   processor.EnqueueAction(&feeder_action);
   processor.EnqueueAction(&download_action);
   processor.StartProcessing();
   ASSERT_FALSE(processor.IsRunning());
 
   g_main_loop_unref(loop);
 }
 
 }  // namespace chromeos_update_engine