[ios] Don't enable real content suggestions in EG tests.

Change-Id: Idd933d2bfcff3e136c4b2787a80d70b562068ceb
Reviewed-on: https://chromium-review.googlesource.com/c/1341206
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609222}

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

@@ -156,11 +156,11 @@ GREYElementInteraction* CellWithMatcher(id<GREYMatcher> matcher) {
   ios::ChromeBrowserState* browserState =
       chrome_test_util::GetOriginalBrowserState();
 
-  // Resets the Service associated with this browserState to a service with
-  // default providers. The previous service is deleted.
+  // Resets the Service associated with this browserState to a new service with
+  // no providers. The previous service is deleted.
   IOSChromeContentSuggestionsServiceFactory::GetInstance()->SetTestingFactory(
       browserState,
-      base::BindRepeating(&CreateChromeContentSuggestionsServiceWithProviders));
+      base::BindRepeating(&CreateChromeContentSuggestionsService));
   [super tearDown];
 }
 

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

@@ -118,11 +118,11 @@ std::unique_ptr<net::test_server::HttpResponse> StandardResponse(
       chrome_test_util::GetOriginalBrowserState();
   ReadingListModelFactory::GetForBrowserState(browserState)->DeleteAllEntries();
 
-  // Resets the Service associated with this browserState to a service with
-  // default providers. The previous service is deleted.
+  // Resets the Service associated with this browserState to a new service with
+  // no providers. The previous service is deleted.
   IOSChromeContentSuggestionsServiceFactory::GetInstance()->SetTestingFactory(
       browserState,
-      base::BindRepeating(&CreateChromeContentSuggestionsServiceWithProviders));
+      base::BindRepeating(&CreateChromeContentSuggestionsService));
   [super tearDown];
 }