[USS] Show USS counters in about:sync page

components/browser_sync/profile_sync_service.h

Index: components/browser_sync/profile_sync_service.h
diff --git a/components/browser_sync/profile_sync_service.h b/components/browser_sync/profile_sync_service.h
index 875de4a21789d97b30e5246dde6a45d83737af73..db71517d43576ae8a03b9c06b26ef807c7d3d727 100644
--- a/components/browser_sync/profile_sync_service.h
+++ b/components/browser_sync/profile_sync_service.h
@@ -321,7 +321,7 @@ class ProfileSyncService : public sync_driver::SyncService,
   base::string16 GetLastSyncedTimeString() const override;
   std::string GetBackendInitializationStateString() const override;
   syncer::SyncCycleSnapshot GetLastCycleSnapshot() const override;
-  base::Value* GetTypeStatusMap() const override;

[Gang Wu, 2016/09/28 00:54:59]

remove this is because ProfileSyncService::OnDirectoryTypeStatusCounterUpdated
do not have const, and cannot add const to OnDirectoryTypeStatusCounterUpdated
since OnDirectoryTypeStatusCounterUpdated uses FOR_EACH_OBSERVER, and
FOR_EACH_OBSERVER uses iterator not const_interator.

[pavely, 2016/09/30 00:01:51]

Acknowledged.

+  base::Value* GetTypeStatusMap() override;
   const GURL& sync_service_url() const override;
   std::string unrecoverable_error_message() const override;
   tracked_objects::Location unrecoverable_error_location() const override;
@@ -384,9 +384,9 @@ class ProfileSyncService : public sync_driver::SyncService,
   void OnDirectoryTypeUpdateCounterUpdated(
       syncer::ModelType type,
       const syncer::UpdateCounters& counters) override;
-  void OnDirectoryTypeStatusCounterUpdated(
+  void OnDatatypeStatusCounterUpdated(
       syncer::ModelType type,
-      const syncer::StatusCounters& counters) override;
+      std::unique_ptr<syncer::StatusCounters> counters) override;
   void OnConnectionStatusChange(syncer::ConnectionStatus status) override;
   void OnPassphraseRequired(
       syncer::PassphraseRequiredReason reason,