Add test for "Track prices on tabs" default on

Bug: 1146636
Change-Id: If26b394b21e60147f54494e5e7bfa9c897177f5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568510Reviewed-by: Yusuf Ozuysal <yusufo@chromium.org>
Reviewed-by: Yue Zhang <yuezhanggg@chromium.org>
Commit-Queue: Zhiyuan Cai <zhiyuancai@google.com>
Cr-Commit-Position: refs/heads/master@{#832570}

chrome/android/javatests/src/org/chromium/chrome/browser/app/appmenu/OverviewAppMenuTest.java

@@ -344,6 +344,8 @@ public class OverviewAppMenuTest {
                 int itemGroupId = item.getGroupId();
                 if (itemGroupId == R.id.OVERVIEW_MODE_MENU) {
                     assertTrue(item.isVisible());
+                    MenuItem trackPricesCheck = menu.findItem(R.id.track_prices_check_id);
+                    assertTrue(trackPricesCheck.isChecked());
                 }
                 if (itemGroupId == R.id.START_SURFACE_MODE_MENU) {
                     assertFalse(item.isVisible());