Revert "Revert "AU: do not copy filesystem during full updates""

This reverts commit d1cd325c3135d88498483da811b594ba6b91ce42

The problem that caused all autotests to fail with the original CL has now been rectified; lab devservers were updated to send the correct delta flag in their omaha response.

Change-Id: I664afb33f72856572baaa658cbd473c07271af36
Reviewed-on: https://gerrit.chromium.org/gerrit/56600
Reviewed-by: Gilad Arnold <garnold@chromium.org>
Tested-by: Gilad Arnold <garnold@chromium.org>
Commit-Queue: Gilad Arnold <garnold@chromium.org>
diff --git a/download_action_unittest.cc b/download_action_unittest.cc
index 3911d55..e937d71 100644
--- a/download_action_unittest.cc
+++ b/download_action_unittest.cc
@@ -131,6 +131,7 @@
       OmahaHashCalculator::OmahaHashOfBytes(&data[1], data.size() - 1);
   uint64_t size = data.size();
   InstallPlan install_plan(false,
+                           false,
                            "",
                            size,
                            hash,
@@ -252,7 +253,8 @@
 
     // takes ownership of passed in HttpFetcher
     ObjectFeederAction<InstallPlan> feeder_action;
-    InstallPlan install_plan(false, "", 0, "", 0, "", temp_file.GetPath(), "");
+    InstallPlan install_plan(false, false, "", 0, "", 0, "",
+                             temp_file.GetPath(), "");
     feeder_action.set_obj(install_plan);
     PrefsMock prefs;
     DownloadAction download_action(&prefs, NULL,
@@ -354,6 +356,7 @@
 
   // takes ownership of passed in HttpFetcher
   InstallPlan install_plan(false,
+                           false,
                            "",
                            1,
                            OmahaHashCalculator::OmahaHashOfString("x"),
@@ -395,7 +398,7 @@
   DirectFileWriter writer;
 
   // takes ownership of passed in HttpFetcher
-  InstallPlan install_plan(false, "", 0, "", 0, "", path, "");
+  InstallPlan install_plan(false, false, "", 0, "", 0, "", path, "");
   ObjectFeederAction<InstallPlan> feeder_action;
   feeder_action.set_obj(install_plan);
   PrefsMock prefs;