Record first sync time and clear browsing data since first sync time during

rollback.

BUG=362679

Review URL: https://codereview.chromium.org/316563003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275243 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 27 insertions, 0 deletions

diff --git a/components/sync_driver/pref_names.cc b/components/sync_driver/pref_names.cc
index c8cafc2..c542c64 100644
--- a/components/sync_driver/pref_names.cc
+++ b/components/sync_driver/pref_names.cc
@@ -98,6 +98,9 @@ const char kSyncSpareBootstrapToken[] = "sync.spare_bootstrap_token";
 // Stores how many times to try rollback before giving up.
 const char kSyncRemainingRollbackTries[] = "sync.remaining_rollback_tries";
 
+// Stores the timestamp of first sync.
+const char kSyncFirstSyncTime[] = "sync.first_sync_time";
+
 }  // namespace prefs
 
 }  // namespace sync_driver
diff --git a/components/sync_driver/pref_names.h b/components/sync_driver/pref_names.h
index f31f8e3..d7e8f80 100644
--- a/components/sync_driver/pref_names.h
+++ b/components/sync_driver/pref_names.h
@@ -62,6 +62,7 @@ extern const char kSyncSpareBootstrapToken[];
 #endif  // defined(OS_CHROMEOS)
 
 extern const char kSyncRemainingRollbackTries[];
+extern const char kSyncFirstSyncTime[];
 
 }  // namespace prefs
 
diff --git a/components/sync_driver/sync_prefs.cc b/components/sync_driver/sync_prefs.cc
index 272915d..2a9f590 100644
--- a/components/sync_driver/sync_prefs.cc
+++ b/components/sync_driver/sync_prefs.cc
@@ -48,6 +48,10 @@ void SyncPrefs::RegisterProfilePrefs(
       prefs::kSyncLastSyncedTime,
       0,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterInt64Pref(
+      prefs::kSyncFirstSyncTime,
+      0,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 
   // All datatypes are on by default, but this gets set explicitly
   // when you configure sync (when turning it on), in
@@ -485,4 +489,17 @@ syncer::ModelTypeSet SyncPrefs::ResolvePrefGroups(
   return types_with_groups;
 }
 
+base::Time SyncPrefs::GetFirstSyncTime() const {
+  return base::Time::FromInternalValue(
+      pref_service_->GetInt64(prefs::kSyncFirstSyncTime));
+}
+
+void SyncPrefs::SetFirstSyncTime(base::Time time) {
+  pref_service_->SetInt64(prefs::kSyncFirstSyncTime, time.ToInternalValue());
+}
+
+void SyncPrefs::ClearFirstSyncTime() {
+  pref_service_->ClearPref(prefs::kSyncFirstSyncTime);
+}
+
 }  // namespace browser_sync
diff --git a/components/sync_driver/sync_prefs.h b/components/sync_driver/sync_prefs.h
index da94c5b..3400824 100644
--- a/components/sync_driver/sync_prefs.h
+++ b/components/sync_driver/sync_prefs.h
@@ -131,6 +131,12 @@ class SyncPrefs : NON_EXPORTED_BASE(public base::NonThreadSafe),
   virtual int GetRemainingRollbackTries() const;
   virtual void SetRemainingRollbackTries(int times);
 
+  // Get/set/clear first sync time of current user. Used to roll back browsing
+  // data later when user signs out.
+  base::Time GetFirstSyncTime() const;
+  void SetFirstSyncTime(base::Time time);
+  void ClearFirstSyncTime();
+
   // For testing.
 
   void SetManagedForTest(bool is_managed);