Client-side changes to support retry GU.

sync/sessions/nudge_tracker.h

Index: sync/sessions/nudge_tracker.h
diff --git a/sync/sessions/nudge_tracker.h b/sync/sessions/nudge_tracker.h
index fcd015034101312d6e71822ee7a772bbbb0af278..aa1d59d5978ec8683c0175215c9c155e800ce34f 100644
--- a/sync/sessions/nudge_tracker.h
+++ b/sync/sessions/nudge_tracker.h
@@ -11,6 +11,7 @@
 #include <map>
 
 #include "base/compiler_specific.h"
+#include "base/time/clock.h"

[rlarocque, 2014/01/08 20:30:08]

I think you can remove this now.

[haitaol1, 2014/01/09 00:30:44]

Done.

 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/protocol/sync.pb.h"
@@ -36,11 +37,14 @@ class SYNC_EXPORT_PRIVATE NudgeTracker {
 
   // Returns true if there is a good reason for performing a get updates
   // request as part of the next sync cycle.
-  bool IsGetUpdatesRequired() const;
+  bool IsGetUpdatesRequired(base::TimeTicks now) const;
 
-  // Tells this class that all required update fetching and committing has
+  // Return true if should perform a sync cycle for GU retry.
+  bool IsRetryRequired(base::TimeTicks now) const;
+
+  // Tells this class that all required update fetching or committing has
   // completed successfully.
-  void RecordSuccessfulSyncCycle();
+  void RecordSuccessfulSyncCycle(base::TimeTicks now);
 
   // Takes note of a local change.
   void RecordLocalChange(ModelTypeSet types);
@@ -105,6 +109,10 @@ class SYNC_EXPORT_PRIVATE NudgeTracker {
   // Adjusts the number of hints that can be stored locally.
   void SetHintBufferSize(size_t size);
 
+  void set_next_retry_time(base::TimeTicks next_retry_time) {
+    next_retry_time_ = next_retry_time;
+  }
+
  private:
   typedef std::map<ModelType, DataTypeTracker> TypeTrackerMap;
 
@@ -130,6 +138,11 @@ class SYNC_EXPORT_PRIVATE NudgeTracker {
 
   size_t num_payloads_per_type_;
 
+  base::TimeTicks last_successful_sync_time_;
+
+  // A retry GU should be issued after this time.
+  base::TimeTicks next_retry_time_;
+
   DISALLOW_COPY_AND_ASSIGN(NudgeTracker);
 };