Client-side changes to support retry GU.

sync/sessions/nudge_tracker.cc

Index: sync/sessions/nudge_tracker.cc
diff --git a/sync/sessions/nudge_tracker.cc b/sync/sessions/nudge_tracker.cc
index d109294a2170c34f52cf7af1d3b683e67758719d..ddb6f218533678c565e35413a9029b5d92693356 100644
--- a/sync/sessions/nudge_tracker.cc
+++ b/sync/sessions/nudge_tracker.cc
@@ -15,8 +15,9 @@ namespace sessions {
 
 size_t NudgeTracker::kDefaultMaxPayloadsPerType = 10;
 
-NudgeTracker::NudgeTracker()
-    : updates_source_(sync_pb::GetUpdatesCallerInfo::UNKNOWN),
+NudgeTracker::NudgeTracker(base::Clock* clock)
+    : clock_(clock),
+      updates_source_(sync_pb::GetUpdatesCallerInfo::UNKNOWN),
       invalidations_enabled_(false),
       invalidations_out_of_sync_(true) {
   ModelTypeSet protocol_types = ProtocolTypes();
@@ -47,6 +48,10 @@ bool NudgeTracker::IsSyncRequired() const {
 bool NudgeTracker::IsGetUpdatesRequired() const {
   if (invalidations_out_of_sync_)
     return true;
+
+  if (IsRetryRequired())
+    return true;
+
   for (TypeTrackerMap::const_iterator it = type_trackers_.begin();
        it != type_trackers_.end(); ++it) {
     if (it->second.IsGetUpdatesRequired()) {
@@ -56,8 +61,16 @@ bool NudgeTracker::IsGetUpdatesRequired() const {
   return false;
 }
 
+bool NudgeTracker::IsRetryRequired() const {
+  return !next_retry_time_.is_null() && next_retry_time_ < clock_->Now();
+}
+
 void NudgeTracker::RecordSuccessfulSyncCycle() {
   updates_source_ = sync_pb::GetUpdatesCallerInfo::UNKNOWN;
+  last_successful_sync_time_ = clock_->Now();
+
+  if (next_retry_time_ < clock_->Now())
+    next_retry_time_ = base::Time();
 
   // A successful cycle while invalidations are enabled puts us back into sync.
   invalidations_out_of_sync_ = !invalidations_enabled_;
@@ -234,5 +247,9 @@ void NudgeTracker::SetHintBufferSize(size_t size) {
   }
 }
 
+void NudgeTracker::RecordSuccessfulRetry() {
+
+}
+
 }  // namespace sessions
 }  // namespace syncer