Happened in https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/38264 on unrelated CL.

[0627/114859.321790:FATAL:main_controller.mm(2356)] Check failed: ![self isTabSwitcherActive].
0   ios_chrome_ui_egtests               0x00000001070869ad base::debug::StackTrace::StackTrace(unsigned long) + 157
1   ios_chrome_ui_egtests               0x00000001070869ed base::debug::StackTrace::StackTrace(unsigned long) + 29
2   ios_chrome_ui_egtests               0x0000000106d9759c base::debug::StackTrace::StackTrace() + 28
3   ios_chrome_ui_egtests               0x0000000106dddaac logging::LogMessage::~LogMessage() + 460
4   ios_chrome_ui_egtests               0x0000000106ddb915 logging::LogMessage::~LogMessage() + 21
5   ios_chrome_ui_egtests               0x0000000106927ece __67-[MainController dismissModalDialogsWithCompletion:dismissOmnibox:]_block_invoke + 478
6   ios_chrome_ui_egtests               0x0000000106925b53 __51-[MainController closeSettingsAnimated:completion:]_block_invoke + 51
7   ios_chrome_ui_egtests               0x0000000105c53f4a __66-[BrowserViewController dismissViewControllerAnimated:completion:]_block_invoke + 122
8   UIKit                               0x000000011188402e -[UIPresentationController transitionDidFinish:] + 1346
9   UIKit                               0x0000000111b0bc1e -[_UICurrentContextPresentationController transitionDidFinish:] + 44
10  UIKit                               0x0000000111887f4f __56-[UIPresentationController runTransitionForCurrentState]_block_invoke_2 + 183
11  UIKit                               0x000000011247c088 -[_UIViewControllerTransitionContext completeTransition:] + 102
12  UIKit                               0x0000000111719d59 _runAfterCACommitDeferredBlocks + 318
13  UIKit                               0x0000000111708bb1 _cleanUpAfterCAFlushAndRunDeferredBlocks + 280
14  UIKit                               0x00000001117380e0 _afterCACommitHandler + 137
15  CoreFoundation                      0x000000011394ac07 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
16  CoreFoundation                      0x000000011394ab5e __CFRunLoopDoObservers + 430
17  CoreFoundation                      0x000000011392e8ab CFRunLoopRunSpecific + 443
18  EarlGrey                            0x00000001158976e6 -[GREYRunLoopSpinner grey_drainRunLoopInActiveModeForDrains:] + 326
19  EarlGrey                            0x00000001158974a1 -[GREYRunLoopSpinner spinWithStopConditionBlock:] + 273
20  EarlGrey                            0x000000011589b1e4 -[GREYUIThreadExecutor executeSyncWithTimeout:block:error:] + 2228
21  EarlGrey                            0x000000011589a6c8 -[GREYUIThreadExecutor drainUntilIdleWithTimeout:] + 248
22  ios_chrome_ui_egtests               0x0000000106c06472 +[ChromeTestCase closeAllTabs] + 98
23  ios_chrome_ui_egtests               0x0000000106c0612e -[ChromeTestCase tearDown] + 286
24  EarlGrey                            0x000000011585447e -[XCTestCase(GREYAdditions) grey_tearDown] + 94
25  XCTest                              0x0000000114d73ef8 __51-[XCTestCase _performTearDownSequenceWithSelector:]_block_invoke + 44
26  XCTest                              0x0000000114d73eb1 -[XCTestCase _performTearDownSequenceWithSelector:] + 97
27  XCTest                              0x0000000114d72f59 __24-[XCTestCase invokeTest]_block_invoke + 888
28  XCTest                              0x0000000114dbc17e -[XCUITestContext performInScope:] + 183
29  XCTest                              0x0000000114d72bd6 -[XCTestCase invokeTest] + 141
30  EarlGrey                            0x0000000115853ecb -[XCTestCase(GREYAdditions) grey_invokeTest] + 1083
31  XCTest                              0x0000000114d73b97 __26-[XCTestCase performTest:]_block_invoke.369 + 42
32  XCTest                              0x0000000114dc0f25 +[XCTContext runInContextForTestCase:block:] + 163
33  XCTest                              0x0000000114d73533 -[XCTestCase performTest:] + 608
34  XCTest                              0x0000000114d6f539 __27-[XCTestSuite performTest:]_block_invoke + 363
35  XCTest                              0x0000000114d6eea0 -[XCTestSuite _performProtectedSectionForTest:testSection:] + 26
36  XCTest                              0x0000000114d6f09d -[XCTestSuite performTest:] + 239
37  XCTest                              0x0000000114d6f539 __27-[XCTestSuite performTest:]_block_invoke + 363
38  XCTest                              0x0000000114d6eea0 -[XCTestSuite _performProtectedSectionForTest:testSection:] + 26
39  XCTest                              0x0000000114d6f09d -[XCTestSuite performTest:] + 239
40  XCTest                              0x0000000114d6f539 __27-[XCTestSuite performTest:]_block_invoke + 363
41  XCTest                              0x0000000114d6eea0 -[XCTestSuite _performProtectedSectionForTest:testSection:] + 26
42  XCTest                              0x0000000114d6f09d -[XCTestSuite performTest:] + 239
43  XCTest                              0x0000000114dc864f __44-[XCTTestRunSession runTestsAndReturnError:]_block_invoke + 40
44  XCTest                              0x0000000114d8271a -[XCTestObservationCenter _observeTestExecutionForBlock:] + 475
45  XCTest                              0x0000000114dc84ee -[XCTTestRunSession runTestsAndReturnError:] + 281
46  XCTest                              0x0000000114d5eaf1 -[XCTestDriver runTestsAndReturnError:] + 314
47  XCTest                              0x0000000114dc0190 _XCTestMain + 619
48  CoreFoundation                      0x000000011394b05c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
49  CoreFoundation                      0x000000011392f83b __CFRunLoopDoBlocks + 203
50  CoreFoundation                      0x000000011392f014 __CFRunLoopRun + 1300
51  CoreFoundation                      0x000000011392e889 CFRunLoopRunSpecific + 409
52  GraphicsServices                    0x0000000119be39c6 GSEventRunModal + 62
53  UIKit                               0x000000011170e5d6 UIApplicationMain + 159
54  ios_chrome_ui_egtests               0x0000000104c779f3 (anonymous namespace)::RunUIApplicationMain(int, char**) + 355
55  ios_chrome_ui_egtests               0x0000000104c774c3 main + 419
56  libdyld.dylib                       0x000000011afa4d81 start + 1