[ios] Disables GaiaAuthFetcherIOSNSURLSessionBridgeTest on iOS 14.

This test's SetUp() tries to mock a class that no longer exists on iOS14
(and therefore crashes).

BUG=1102903

Change-Id: Iba82cecec3b5ae6c98b2b3001b5ff91a05788321
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2284100Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785985}

ios/chrome/browser/signin/gaia_auth_fetcher_ios_ns_url_session_bridge_unittests.mm

@@ -187,6 +187,12 @@ NSURLSession* TestGaiaAuthFetcherIOSNSURLSessionBridge::CreateNSURLSession(
 #pragma mark - GaiaAuthFetcherIOSNSURLSessionBridgeTest
 
 void GaiaAuthFetcherIOSNSURLSessionBridgeTest::SetUp() {
+  // TODO(crbug.com/1102903): __NSCFURLSessionConfiguration does not exist on
+  // iOS 14.
+  if (@available(iOS 14, *)) {
+    return;
+  }
+
   std::vector<base::Feature> enabled_features;
   std::vector<base::Feature> disabled_features;
   enabled_features.push_back(kUseNSURLSessionForGaiaSigninRequests);
@@ -210,6 +216,12 @@ void GaiaAuthFetcherIOSNSURLSessionBridgeTest::SetUp() {
 }
 
 void GaiaAuthFetcherIOSNSURLSessionBridgeTest::TearDown() {
+  // TODO(crbug.com/1102903): __NSCFURLSessionConfiguration does not exist on
+  // iOS 14.
+  if (@available(iOS 14, *)) {
+    return;
+  }
+
   ASSERT_OCMOCK_VERIFY((id)http_cookie_storage_mock_);
   ASSERT_OCMOCK_VERIFY((id)url_session_mock_);
   ASSERT_OCMOCK_VERIFY((id)url_session_data_task_mock_);
@@ -410,6 +422,12 @@ TEST_F(GaiaAuthFetcherIOSNSURLSessionBridgeTest, DISABLED_FetchWithRedirect) {
 
 // Tests to cancel the request.
 TEST_F(GaiaAuthFetcherIOSNSURLSessionBridgeTest, FetchWithCancel) {
+  // TODO(crbug.com/1102903): __NSCFURLSessionConfiguration does not exist on
+  // iOS 14.
+  if (@available(iOS 14, *)) {
+    return;
+  }
+
   ns_url_session_bridge_->Fetch(GetFetchGURL(), "", "", false);
   OCMExpect([http_cookie_storage_mock_
       storeCookies:@[]
@@ -428,6 +446,12 @@ TEST_F(GaiaAuthFetcherIOSNSURLSessionBridgeTest, FetchWithCancel) {
 
 // Tests a request with error.
 TEST_F(GaiaAuthFetcherIOSNSURLSessionBridgeTest, FetchWithError) {
+  // TODO(crbug.com/1102903): __NSCFURLSessionConfiguration does not exist on
+  // iOS 14.
+  if (@available(iOS 14, *)) {
+    return;
+  }
+
   ns_url_session_bridge_->Fetch(GetFetchGURL(), "", "", false);
   OCMExpect([http_cookie_storage_mock_
       storeCookies:@[]