[iOS] Don't reload NTP for incognito

(cherry picked from commit 13ea7ac64e666ba87bb93ea45e4b7c58d3cf764f)

Bug: 1189129
Change-Id: I376556db1041b9e29de870132afdfb46982fc01c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3271599
Commit-Queue: Adam Trudeau-Arcaro <adamta@google.com>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#940438}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3278374
Cr-Commit-Position: refs/branch-heads/4664@{#992}
Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}

diff --git a/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.h b/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.h
index 4ca1095..e83969b 100644
--- a/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.h
+++ b/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.h

@@ -64,7 +64,7 @@
 // The content offset of the scroll view.
 - (CGPoint)contentOffset;
 
-// Reloads the content of the NewTabPage.
+// Reloads the content of the NewTabPage. Does not do anything on Incognito.
 - (void)reload;
 
 // Calls when the visibility of the NTP changes.

diff --git a/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.mm b/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.mm
index 35397642..b699b591 100644
--- a/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.mm
+++ b/ios/chrome/browser/ui/ntp/new_tab_page_coordinator.mm

@@ -440,6 +440,9 @@
 }
 
 - (void)reload {
+  if (self.browser->GetBrowserState()->IsOffTheRecord()) {
+    return;
+  }
   ios::GetChromeBrowserProvider().GetDiscoverFeedProvider()->RefreshFeed();
   [self reloadContentSuggestions];
 }