browser_side_navigation_unit_tests failing on chromium.mac/Mac10.12 Tests

Builders failed on: 
- Mac10.12 Tests: 
  https://build.chromium.org/p/chromium.mac/builders/Mac10.12%20Tests

Error from the logs:
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[ RUN      ] BrowserWindowTouchBarUnitTest.TouchBarItems
2017-04-28 08:41:11.307 unit_tests[56844:716556] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fd744c86220>. Break on NSLog to debug.
2017-04-28 08:41:11.308 unit_tests[56844:716556] Call stack:
(
    "+callStackSymbols disabled for performance reasons"
)
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:41: Failure
Value of: [touchBarItemIds containsObject:@"BackForwardTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:42: Failure
Value of: [touchBarItemIds containsObject:@"ReloadOrStopTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:43: Failure
Value of: [touchBarItemIds containsObject:@"HomeTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:44: Failure
Value of: [touchBarItemIds containsObject:@"SearchTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:45: Failure
Value of: [touchBarItemIds containsObject:@"NewTabTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:46: Failure
Value of: [touchBarItemIds containsObject:@"StarTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:50: Failure
Value of: [touchBarItemIds containsObject:@"BackForwardTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:51: Failure
Value of: [touchBarItemIds containsObject:@"ReloadOrStopTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:53: Failure
Value of: [touchBarItemIds containsObject:@"SearchTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:54: Failure
Value of: [touchBarItemIds containsObject:@"NewTabTouchId"]
  Actual: false
Expected: true
../../chrome/browser/ui/cocoa/browser_window_touch_bar_unittest.mm:55: Failure
Value of: [touchBarItemIds containsObject:@"StarTouchId"]
  Actual: false
Expected: true
[  FAILED  ] BrowserWindowTouchBarUnitTest.TouchBarItems (246 ms)
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