[ios] Forward new SyncServiceObserver callback to ObjC bridge

A recent CL introduced a new optional observer method in the
SyncServiceObserver interface. This CL forwards that callback in the
iOS-specific Objective-C bridge of that interface.

BUG=512825

Review URL: https://codereview.chromium.org/1420093003

Cr-Commit-Position: refs/heads/master@{#356017}

2 files changed, 9 insertions, 1 deletions

diff --git a/ios/chrome/browser/sync/sync_observer_bridge.h b/ios/chrome/browser/sync/sync_observer_bridge.h
index 0ea0ca1..7f78a23 100644
--- a/ios/chrome/browser/sync/sync_observer_bridge.h
+++ b/ios/chrome/browser/sync/sync_observer_bridge.h
@@ -15,8 +15,10 @@ namespace sync_driver {
 class SyncService;
 }
 
-@protocol SyncObserverModelBridge
+@protocol SyncObserverModelBridge<NSObject>
 - (void)onSyncStateChanged;
+@optional
+- (void)onSyncConfigurationCompleted;
 @end
 
 // C++ class to monitor profile sync status in Objective-C type.
@@ -31,6 +33,7 @@ class SyncObserverBridge : public sync_driver::SyncServiceObserver {
  private:
    // sync_driver::SyncServiceObserver implementation:
    void OnStateChanged() override;
+   void OnSyncConfigurationCompleted() override;
 
   base::WeakNSProtocol<id<SyncObserverModelBridge>> delegate_;
   ScopedObserver<sync_driver::SyncService, sync_driver::SyncServiceObserver>
diff --git a/ios/chrome/browser/sync/sync_observer_bridge.mm b/ios/chrome/browser/sync/sync_observer_bridge.mm
index 0ccb02a..8e6f883 100644
--- a/ios/chrome/browser/sync/sync_observer_bridge.mm
+++ b/ios/chrome/browser/sync/sync_observer_bridge.mm
@@ -21,3 +21,8 @@ SyncObserverBridge::~SyncObserverBridge() {
 void SyncObserverBridge::OnStateChanged() {
   [delegate_ onSyncStateChanged];
 }
+
+void SyncObserverBridge::OnSyncConfigurationCompleted() {
+  if ([delegate_ respondsToSelector:@selector(onSyncConfigurationCompleted:)])
+    [delegate_ onSyncConfigurationCompleted];
+}