AU: Start checkpointing update progress.
Checkpoint the manifest metadata size and the update
check response hash in the preference store. Also checkpoint
the next operation and data offset.
Add methods for getting/setting hash context.
BUG=7390,7394
TEST=unit tests
Change-Id: I25291bf598ac9b0f1033e11cfe59df45b1f6eeab
Review URL: http://codereview.chromium.org/3521016
diff --git a/prefs_interface.h b/prefs_interface.h
index 724651e..a9b20a5 100644
--- a/prefs_interface.h
+++ b/prefs_interface.h
@@ -12,6 +12,11 @@
extern const char kPrefsDeltaUpdateFailures[];
extern const char kPrefsLastActivePingDay[];
extern const char kPrefsLastRollCallPingDay[];
+extern const char kPrefsManifestMetadataSize[];
+extern const char kPrefsUpdateCheckResponseHash[];
+extern const char kPrefsUpdateStateNextDataOffset[];
+extern const char kPrefsUpdateStateNextOperation[];
+extern const char kPrefsUpdateStateSignedSHA256Context[];
// The prefs interface allows access to a persistent preferences
// store. The two reasons for providing this as an interface are