Remove WebToolbarDelegate from GoogleLandingDataSource.

ios/chrome/browser/ui/ntp/google_landing_consumer.h

Index: ios/chrome/browser/ui/ntp/google_landing_consumer.h
diff --git a/ios/chrome/browser/ui/ntp/google_landing_consumer.h b/ios/chrome/browser/ui/ntp/google_landing_consumer.h
index a3ccc877c7d97fb275aa901363a42e2cb42c45fd..b91d33e17d16f7276e02be28ffc09ac114ad8a52 100644
--- a/ios/chrome/browser/ui/ntp/google_landing_consumer.h
+++ b/ios/chrome/browser/ui/ntp/google_landing_consumer.h
@@ -44,6 +44,12 @@
 // The number of tabs to show in the google landing fake toolbar.
 - (void)setTabCount:(int)tabCount;
 
+// |YES| if the google landing toolbar can show the forward arrow.
+- (void)setCanGoForward:(BOOL)canGoForward;
+
+// |YES| if the google landing toolbar can show the back arrow.
+- (void)setCanGoBack:(BOOL)canGoBack;
+
 // TODO(crbug.com/694750): This should be replaced with consumer suitable data
 // type property.
 // Tells the consumer to that most visited data updated.