[Sync] Add custom passphrase time tracking

We now track when a custom passphrase is set, and in conjunction with
the migration time now support querying the passphrase time (returns
migration time for FROZEN_IMPLICIT type, or custom passphrase time for
CUSTOM_PASSPHRASE type).

Plumb this information up through to the PSS for eventual use in the UI.

BUG=129665


Review URL: https://chromiumcodereview.appspot.com/11098007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@161478 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 0 deletions

diff --git a/sync/internal_api/sync_encryption_handler_impl.h b/sync/internal_api/sync_encryption_handler_impl.h
index 27f7080..d93db15 100644
--- a/sync/internal_api/sync_encryption_handler_impl.h
+++ b/sync/internal_api/sync_encryption_handler_impl.h
@@ -87,6 +87,7 @@ class SyncEncryptionHandlerImpl
 
   bool MigratedToKeystore();
   base::Time migration_time() const;
+  base::Time custom_passphrase_time() const;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(SyncEncryptionHandlerImplTest,
@@ -256,6 +257,10 @@ class SyncEncryptionHandlerImpl
   // Will not perform re-encryption.
   void EnableEncryptEverythingImpl(syncable::BaseTransaction* const trans);
 
+  // If an explicit passphrase is in use, returns the time at which it was set
+  // (if known). Else return base::Time().
+  base::Time GetExplicitPassphraseTime() const;
+
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<SyncEncryptionHandlerImpl> weak_ptr_factory_;
@@ -289,6 +294,11 @@ class SyncEncryptionHandlerImpl
   // The time the nigori was migrated to support keystore encryption.
   base::Time migration_time_;
 
+  // The time the custom passphrase was set for this account. Not valid
+  // if there is no custom passphrase or the custom passphrase was set
+  // before support for this field was added.
+  base::Time custom_passphrase_time_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncEncryptionHandlerImpl);
 };