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/payload_state.cc b/payload_state.cc
index 3de9e04..0636f56 100644
--- a/payload_state.cc
+++ b/payload_state.cc
@@ -189,6 +189,7 @@
     case kErrorCodeDownloadInvalidMetadataSignature:
     case kErrorCodeDownloadOperationHashMissingError:
     case kErrorCodeDownloadMetadataSignatureMissingError:
+    case kErrorCodePayloadMismatchedType:
       IncrementUrlIndex();
       break;
 
@@ -239,7 +240,6 @@
       break;
 
     case kErrorCodeSuccess:                            // success code
-    case kErrorCodeSetBootableFlagError:               // unused
     case kErrorCodeUmaReportedMax:                     // not an error code
     case kErrorCodeOmahaRequestHTTPResponseBase:       // aggregated already
     case kErrorCodeDevModeFlag:                       // not an error code