[iOS] New URL for Discover feed menu 'Learn More' item

Adds URL for 'Learn More' item in the NTP' Discover feed header menu.

Bug: 1111837, 1085419
Change-Id: If0bd7519f213cfb0667fe67c962d6d9ceef1d62b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367732Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: Adam Trudeau-Arcaro <adamta@google.com>
Cr-Commit-Position: refs/heads/master@{#800308}

ios/chrome/browser/ui/content_suggestions/content_suggestions_commands.h

@@ -35,10 +35,15 @@
 - (void)handlePromoTapped;
 // Handles the actions following a tap on the "Learn more" item.
 - (void)handleLearnMoreTapped;
-// Handles the actions following a tap on the "Manage Activity" item.
-- (void)handleManageActivityTapped;
-// Handles the actions following a tap on the "Manage Interests" item.
-- (void)handleManageInterestsTapped;
+// Handles the actions following a tap on the "Manage Activity" item in the
+// Discover feed menu.
+- (void)handleFeedManageActivityTapped;
+// Handles the actions following a tap on the "Manage Interests" item in the
+// Discover feed menu.
+- (void)handleFeedManageInterestsTapped;
+// Handles the actions following a tap on the "Learn More" item in the Discover
+// feed menu.
+- (void)handleFeedLearnMoreTapped;
 
 @end
 

ios/chrome/browser/ui/content_suggestions/content_suggestions_coordinator.mm

@@ -457,7 +457,7 @@
         addItemWithTitle:l10n_util::GetNSString(
                              IDS_IOS_DISCOVER_FEED_MENU_MANAGE_ACTIVITY_ITEM)
                   action:^{
-                    [weakSelf.NTPMediator handleManageActivityTapped];
+                    [weakSelf.NTPMediator handleFeedManageActivityTapped];
                   }
                    style:UIAlertActionStyleDefault];
 
@@ -465,7 +465,7 @@
         addItemWithTitle:l10n_util::GetNSString(
                              IDS_IOS_DISCOVER_FEED_MENU_MANAGE_INTERESTS_ITEM)
                   action:^{
-                    [weakSelf.NTPMediator handleManageInterestsTapped];
+                    [weakSelf.NTPMediator handleFeedManageInterestsTapped];
                   }
                    style:UIAlertActionStyleDefault];
   }
@@ -474,7 +474,7 @@
       addItemWithTitle:l10n_util::GetNSString(
                            IDS_IOS_DISCOVER_FEED_MENU_LEARN_MORE_ITEM)
                 action:^{
-                  [weakSelf.NTPMediator handleLearnMoreTapped];
+                  [weakSelf.NTPMediator handleFeedLearnMoreTapped];
                 }
                  style:UIAlertActionStyleDefault];
   [self.alertCoordinator start];

ios/chrome/browser/ui/content_suggestions/ntp_home_mediator.mm

@@ -71,6 +71,9 @@ const char kFeedManageActivityURL[] =
 // URL for 'Manage Interests' item in the Discover feed menu.
 const char kFeedManageInterestsURL[] =
     "https://google.com/preferences/interests";
+// URL for 'Learn More' item in the Discover feed menu;
+const char kFeedLearnMoreURL[] = "https://support.google.com/chrome/"
+                                 "?p=new_tab&co=GENIE.Platform%3DiOS&oco=1";
 // URL for the page displaying help for the NTP.
 const char kNTPHelpURL[] =
     "https://support.google.com/chrome/?p=ios_new_tab&ios=1";
@@ -403,16 +406,21 @@ const char kNTPHelpURL[] =
   // TODO(crbug.com/1085419): Add metrics.
 }
 
-- (void)handleManageActivityTapped {
+- (void)handleFeedManageActivityTapped {
   [self openMenuItemWebPage:GURL(kFeedManageActivityURL)];
 }
 
-- (void)handleManageInterestsTapped {
+- (void)handleFeedManageInterestsTapped {
   [self openMenuItemWebPage:GURL(kFeedManageInterestsURL)];
 }
 
+- (void)handleFeedLearnMoreTapped {
+  [self openMenuItemWebPage:GURL(kFeedLearnMoreURL)];
+}
+
 - (void)handleLearnMoreTapped {
   [self openMenuItemWebPage:GURL(kNTPHelpURL)];
+  [self.NTPMetrics recordAction:new_tab_page_uma::ACTION_OPENED_LEARN_MORE];
 }
 
 #pragma mark - ContentSuggestionsGestureCommands