[ios] Fixes FullscreenWebStateObserverTest with the UIRefresh flag on.

BUG=818736

Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ib36d98ce7d4a89b1384f8ea5169705d7b64a87c9
Reviewed-on: https://chromium-review.googlesource.com/1022370
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552438}

ios/chrome/browser/ui/fullscreen/BUILD.gn

@@ -135,6 +135,8 @@ source_set("unit_tests") {
     ":fullscreen",
     ":internal",
     ":ui",
+    "//base/test:test_support",
+    "//ios/chrome/browser/ui:feature_flags",
     "//ios/chrome/browser/ui:ui_util",
     "//ios/chrome/browser/ui/broadcaster",
     "//ios/chrome/browser/ui/fullscreen/test",

ios/chrome/browser/ui/fullscreen/fullscreen_web_state_observer_unittest.mm

@@ -4,10 +4,12 @@
 
 #import "ios/chrome/browser/ui/fullscreen/fullscreen_web_state_observer.h"
 
+#include "base/test/scoped_feature_list.h"
 #import "ios/chrome/browser/ui/fullscreen/fullscreen_model.h"
 #import "ios/chrome/browser/ui/fullscreen/test/fullscreen_model_test_util.h"
 #import "ios/chrome/browser/ui/fullscreen/test/test_fullscreen_controller.h"
 #import "ios/chrome/browser/ui/fullscreen/test/test_fullscreen_mediator.h"
+#include "ios/chrome/browser/ui/ui_feature_flags.h"
 #import "ios/web/public/navigation_item.h"
 #include "ios/web/public/ssl_status.h"
 #import "ios/web/public/test/fakes/fake_navigation_context.h"
@@ -83,7 +85,10 @@ TEST_F(FullscreenWebStateObserverTest, NoResetForSameDocument) {
 }
 
 // Tests that the model is disabled when a load is occurring.
-TEST_F(FullscreenWebStateObserverTest, DisableDuringLoad) {
+TEST_F(FullscreenWebStateObserverTest, DisableDuringLoadWithUIRefreshDisabled) {
+  base::test::ScopedFeatureList scoped_feature_list;
+  scoped_feature_list.InitAndDisableFeature(kUIRefreshPhase1);
+
   EXPECT_TRUE(model().enabled());
   web_state().SetLoading(true);
   EXPECT_FALSE(model().enabled());
@@ -91,6 +96,18 @@ TEST_F(FullscreenWebStateObserverTest, DisableDuringLoad) {
   EXPECT_TRUE(model().enabled());
 }
 
+// Tests that the model is not disabled when a load is occurring.
+TEST_F(FullscreenWebStateObserverTest, DisableDuringLoadWithUIRefreshEnabled) {
+  base::test::ScopedFeatureList scoped_feature_list;
+  scoped_feature_list.InitAndEnableFeature(kUIRefreshPhase1);
+
+  EXPECT_TRUE(model().enabled());
+  web_state().SetLoading(true);
+  EXPECT_TRUE(model().enabled());
+  web_state().SetLoading(false);
+  EXPECT_TRUE(model().enabled());
+}
+
 // Tests that the model is disabled when the SSL status is broken.
 TEST_F(FullscreenWebStateObserverTest, DisableForBrokenSSL) {
   std::unique_ptr<web::NavigationItem> item = web::NavigationItem::Create();