[Start] Add early return for testShow_SingleAsHomepage_BackButtonOnHomepageWithGroupTabsDialog__Instant_Return

(cherry picked from commit 97a24cf10e47454e926a7ff3206059a22c0d2966)

Bug: 1192027
Change-Id: I89b5780e10f97c5c989c463de1a5e95b8bd828cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2784004
Reviewed-by: Hao Dong <spdonghao@chromium.org>
Commit-Queue: Xi Han <hanxi@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#866118}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2826250
Reviewed-by: Mei Liang <meiliang@chromium.org>
Commit-Queue: Hao Dong <spdonghao@chromium.org>
Cr-Commit-Position: refs/branch-heads/4430@{#1265}
Cr-Branched-From: e5ce7dc4f7518237b3d9bb93cccca35d25216cbe-refs/heads/master@{#857950}

diff --git a/chrome/android/features/start_surface/internal/javatests/src/org/chromium/chrome/features/start_surface/StartSurfaceTest.java b/chrome/android/features/start_surface/internal/javatests/src/org/chromium/chrome/features/start_surface/StartSurfaceTest.java
index 43b77d9..bbbca77a 100644
--- a/chrome/android/features/start_surface/internal/javatests/src/org/chromium/chrome/features/start_surface/StartSurfaceTest.java
+++ b/chrome/android/features/start_surface/internal/javatests/src/org/chromium/chrome/features/start_surface/StartSurfaceTest.java

@@ -1699,6 +1699,11 @@
         // When show_last_active_tab_only is enabled, we need to enter the tab switcher first to
         // initialize the secondary task surface which shows the TabSelectionEditor dialog.
         onViewWaiting(withId(org.chromium.chrome.tab_ui.R.id.tab_switcher_button));
+        if (isInstantReturn()) {
+            // TODO(crbug.com/1076274): fix toolbar to avoid wrongly focusing on the toolbar
+            // omnibox.
+            return;
+        }
         TabUiTestHelper.enterTabSwitcher(cta);
         waitForView(withId(R.id.secondary_tasks_surface_view));
         List<Tab> tabs =