[ios] Refreshes Discover Feed if History was cleared.

Bug: 1085419
Change-Id: I3462548de584dbc49601c0c608d1046f6dd770ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363725
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Ganggui Tang <gogerald@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799974}

ios/chrome/browser/discover_feed/discover_feed_service.mm

@@ -26,9 +26,7 @@ DiscoverFeedService::DiscoverFeedService(ChromeBrowserState* browser_state) {
   DiscoverFeedConfiguration* discover_config =
       [[DiscoverFeedConfiguration alloc] init];
   discover_config.browserState = browser_state;
-  // TODO(crbug.com/1085419): Send discover_config once downstream CL lands.
-  discover_feed_provider_->StartFeed(
-      AuthenticationServiceFactory::GetForBrowserState(browser_state));
+  discover_feed_provider_->StartFeed(discover_config);
 }
 
 DiscoverFeedService::~DiscoverFeedService() {}

ios/chrome/browser/ui/settings/clear_browsing_data/clear_browsing_data_table_view_controller.mm

@@ -342,10 +342,15 @@
     });
   };
 
-  // Set the kLastClearBrowsingDataTime Pref.
-  self.browserState->GetPrefs()->SetInt64(
-      browsing_data::prefs::kLastClearBrowsingDataTime,
-      base::Time::Now().ToTimeT());
+  // If browsing History will be cleared set the kLastClearBrowsingDataTime.
+  // TODO(crbug.com/1085419): This pref is used by the Feed to prevent the
+  // showing of customized content after history has been cleared. We might want
+  // to create a specific Pref for this.
+  if (IsRemoveDataMaskSet(removeMask, BrowsingDataRemoveMask::REMOVE_HISTORY)) {
+    browserState->GetPrefs()->SetInt64(
+        browsing_data::prefs::kLastClearBrowsingDataTime,
+        base::Time::Now().ToTimeT());
+  }
 
   [self.dispatcher
       removeBrowsingDataForBrowserState:browserState