Example failure:

https://uberchromegw.corp.google.com/i/internal.bling.main/builders/iphone10-device-x64/builds/2257/steps/ios_chrome_web_egtests%20%28iPhone%206s%20iOS%2010.0.1%29%20on%20iOS-10.0.1/logs/stdio

Test Case '-[NavigationTestCase testHistoryForwardNavigation]' started.
2016-12-26 08:37:39.900322 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x170a24320>
2016-12-26 08:37:39.901175 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x170835c40>
2016-12-26 08:37:40.399453 ios_chrome_web_egtests[42648:22257397] View is moving to nil window. Skipping viewWillDisappear state tracking.
2016-12-26 08:37:40.643426 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x170a282c0>
2016-12-26 08:37:40.780299 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x17462f800>
2016-12-26 08:37:40.792550 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x174629680>
2016-12-26 08:37:40.827370 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x17462e240>
2016-12-26 08:37:41.884373 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x1748333e0>
2016-12-26 08:37:41.917230 ios_chrome_web_egtests[42648:22257397] Adjusting repeatCount to 8.375000 for animation <CAKeyframeAnimation: 0x17443fc80>
2016-12-26 08:37:42.078315 ios_chrome_web_egtests[42648:22257397] Could not signal service com.apple.WebKit.WebContent: 113: Could not find specified service
../../ios/chrome/browser/web/navigation_egtest.mm:403: error: -[NavigationTestCase testHistoryForwardNavigation] : Assertion 'assertWithMatcher:notNil' was not performed because no UI element matching (kindOfClass("OmniboxTextFieldIOS") && an object with text "localhost:8080/test/") was found.
(
	0   EarlGrey                            0x0000000103a8db50 -[XCTestCase(GREYAdditions) grey_markAsFailedAtLine:inFile:reason:detailDescription:] + 112
	1   EarlGrey                            0x0000000103a9f178 -[GREYDefaultFailureHandler handleException:details:] + 1672
	2   EarlGrey                            0x0000000103a99c84 -[GREYElementInteraction grey_handleFailureOfAssertion:assertionError:elementNotFoundError:userProvidedOutError:] + 1056
	3   EarlGrey                            0x0000000103a98fd8 __39-[GREYElementInteraction assert:error:]_block_invoke + 796
	4   EarlGrey                            0x0000000103aad20c __59-[GREYUIThreadExecutor executeSyncWithTimeout:block:error:]_block_invoke + 40
	5   EarlGrey                            0x0000000103aab89c __54-[GREYRunLoopSpinner grey_checkConditionInActiveMode:]_block_invoke + 252
	6   CoreFoundation                      0x0000000191972160 <redacted> + 20
	7   CoreFoundation                      0x000000019197195c <redacted> + 288
	8   CoreFoundation                      0x000000019196f7b0 <redacted> + 788
	9   CoreFoundation                      0x000000019189e048 CFRunLoopRunSpecific + 444
	10  EarlGrey                            0x0000000103aab708 -[GREYRunLoopSpinner grey_checkConditionInActiveMode:] + 252
	11  EarlGrey                            0x0000000103aaabec -[GREYRunLoopSpinner spinWithStopConditionBlock:] + 520
	12  EarlGrey                            0x0000000103aad0e0 -[GREYUIThreadExecutor executeSyncWithTimeout:block:error:] + 764
	13  EarlGrey                            0x0000000103a98a3c -[GREYElementInteraction assert:error:] + 932
	14  EarlGrey                            0x0000000103a99128 -[GREYElementInteraction assertWithMatcher:] + 68
	15  ios_chrome_web_egtests              0x00000001000ad038 -[NavigationTestCase testHistoryForwardNavigation] + 884
	16  CoreFoundation                      0x00000001919ca160 <redacted> + 144
	17  CoreFoundation                      0x00000001918bdc3c <redacted> + 284
	18  XCTest                              0x000000010398e34c __24-[XCTestCase invokeTest]_block_invoke_2 + 388
	19  XCTest                              0x00000001039c2e9c -[XCTestContext performInScope:] + 208
	20  XCTest                              0x000000010398e1b0 -[XCTestCase invokeTest] + 268
	21  EarlGrey                            0x0000000103a8e0e8 -[XCTestCase(GREYAdditions) grey_invokeTest] + 992
	22  XCTest                              0x000000010398e884 -[XCTestCase performTest:] + 460
	23  XCTest                              0x000000010398bd00 -[XCTestSuite performTest:] + 428
	24  XCTest                              0x000000010398bd00 -[XCTestSuite performTest:] + 428
	25  XCTest                              0x000000010398bd00 -[XCTestSuite performTest:] + 428
	26  XCTest                              0x0000000103977c74 __25-[XCTestDriver _runSuite]_block_invoke + 56
	27  XCTest                              0x0000000103998504 -[XCTestObservationCenter _observeTestExecutionForBlock:] + 528
	28  XCTest                              0x0000000103977b0c -[XCTestDriver _runSuite] + 460
	29  XCTest                              0x0000000103978890 -[XCTestDriver _checkForTestManager] + 296
	30  XCTest                              0x00000001039c4368 _XCTestMain + 628
	31  CoreFoundation                      0x0000000191972160 <redacted> + 20
	32  CoreFoundation                      0x000000019197195c <redacted> + 288
	33  CoreFoundation                      0x000000019196f7b0 <redacted> + 788
	34  CoreFoundation                      0x000000019189e048 CFRunLoopRunSpecific + 444
	35  GraphicsServices                    0x0000000193321198 GSEventRunModal + 180
	36  UIKit                               0x0000000197877818 <redacted> + 684
	37  UIKit                               0x0000000197872550 UIApplicationMain + 208
	38  ios_chrome_web_egtests              0x00000001000a0a24 main + 576
	39  libdyld.dylib                       0x00000001908805b8 <redacted> + 4
)

Exception: NoMatchingElementException
Reason: Assertion 'assertWithMatcher:notNil' was not performed because no UI element matching (kindOfClass("OmniboxTextFieldIOS") && an object with text "localhost:8080/test/") was found.
Complete Error: Error Domain=com.google.earlgrey.ElementInteractionErrorDomain Code=0 "(null)" UserInfo={NSUnderlyingError=0x17044e370 {Error Domain=com.google.earlgrey.ElementInteractionErrorDomain Code=0 "No element found." UserInfo={NSLocalizedDescription=No element found.}}}

Screenshot At Failure: /var/mobile/Containers/Data/Application/7F6925E4-F8E8-466B-8897-6BFBCFE4E496/Documents/NavigationTestCase_testHistoryForwardNavigation.png
Visibility Checker's Most Recent Before Image: /var/mobile/Containers/Data/Application/7F6925E4-F8E8-466B-8897-6BFBCFE4E496/Documents/NavigationTestCase_testHistoryForwardNavigation_before.png
Visibility Checker's Most Recent Expected After Image: /var/mobile/Containers/Data/Application/7F6925E4-F8E8-466B-8897-6BFBCFE4E496/Documents/NavigationTestCase_testHistoryForwardNavigation_after_expected.png
Visibility Checker's Most Recent Actual After Image: /var/mobile/Containers/Data/Application/7F6925E4-F8E8-466B-8897-6BFBCFE4E496/Documents/NavigationTestCase_testHistoryForwardNavigation_after_actual.png


Application window hierarchy (ordered by window level, from front to back):

Legend:
[Window 1] = [Frontmost Window]
[AX] = [Accessibility]
[UIE] = [User Interaction Enabled]

========== Window 1 ==========

<UITextEffectsWindow:0x143920a90; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; alpha=1>
  |--<UIInputSetContainerView:0x143921710; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; opaque; alpha=1>
  |  |--<UIInputSetHostView:0x143921ad0; AX=N; AX.frame={{0, 667}, {375, 0}}; AX.activationPoint={187.5, 667}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 667}, {375, 0}}; opaque; alpha=1>

========== Window 2 ==========

<ChromeOverlayWindow:0x141e14ae0; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; opaque; alpha=1>
  |--<UIView:0x141d47d10; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; opaque; alpha=1>
  |  |--<UIView:0x141d48b40; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; opaque; alpha=1>
  |  |  |--<UIView:0x141d494a0; AX=N; AX.frame={{0, 0}, {375, 20}}; AX.activationPoint={187.5, 10}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 20}}; opaque; alpha=1>
  |  |  |--<BrowserContainerView:0x141d491d0; AX=N; AX.frame={{0, 20}, {375, 647}}; AX.activationPoint={187.5, 343.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 20}, {375, 647}}; opaque; alpha=1>
  |  |  |  |--<CRWWebControllerContainerView:0x141eb2810; AX=N; AX.id='Container View'; AX.frame={{0, 20}, {375, 647}}; AX.activationPoint={187.5, 343.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 647}}; opaque; alpha=1>
  |  |  |  |  |--<CRWWebViewContentView:0x14399b570; AX=N; AX.frame={{0, 20}, {375, 647}}; AX.activationPoint={187.5, 343.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 647}}; opaque; alpha=1>
  |  |  |  |  |  |--<WKWebView:0x142a60e00; AX=N; AX.frame={{0, 76}, {375, 591}}; AX.activationPoint={187.5, 371.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 56}, {375, 591}}; opaque; alpha=1>
  |  |  |  |  |  |  |--<WKScrollView:0x142a6aa00; AX=N; AX.frame={{0, 76}, {375, 591}}; AX.activationPoint={187.5, 371.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 591}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |--<WKContentView:0x142a12600; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375.11658787727356, 591.00001192092896}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |--<UIView:0x1439ad740; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {980, 1544}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |--<UIView:0x141ee0790; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {980, 1544}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x143a5af70; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {980, 1544}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x143a9b8b0; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {980, 1544}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x143a7cd90; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {980, 1544}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x141d04350; AX=N; AX.frame={{0, 76}, {0, 0}}; AX.activationPoint={0, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {0, 0}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x143a88800; AX=N; AX.frame={{0, 76}, {375.00001057515675, 512.00001443861402}}; AX.activationPoint={187.50000528757838, 332.00000721930701}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 512}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x143ab9240; AX=N; AX.frame={{0, 588.00001443861402}, {375.00001057515675, 79.000002227832965}}; AX.activationPoint={187.50000528757838, 627.5000155525305}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 512}, {375, 79}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x141d2b510; AX=N; AX.frame={{0, 76}, {0, 0}}; AX.activationPoint={0, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {0, 0}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x141dc71e0; AX=N; AX.frame={{0, 76}, {0, 0}}; AX.activationPoint={0, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {0, 0}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |  |  |  |--<WKCompositingView:0x141dfa2e0; AX=N; AX.frame={{0, 76}, {0, 0}}; AX.activationPoint={0, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {0, 0}}; opaque; alpha=1>
  |  |  |  |  |  |  |  |  |--<AXRemoteElement:0x176065380; AX=N; AX.frame={{0, 76}, {375.11658787727356, 591.00001192092896}}; AX.activationPoint={187.55829393863678, 371.50000596046448}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'>
  |  |  |  |  |  |  |  |--<UIView:0x143979000; AX=N; AX.frame={{0, 76}, {0, 0}}; AX.activationPoint={0, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {0, 0}}; alpha=1>
  |  |  |  |  |  |  |  |--<UIImageView:0x143931550; AX=N; AX.frame={{369.5, 79}, {2.5, 585}}; AX.activationPoint={370.75, 371.5}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{369.5, 3}, {2.5, 585}}; alpha=0; UIE=N>
  |  |  |  |  |  |  |  |--<UIImageView:0x1439b2700; AX=N; AX.frame={{3, 661.5}, {369, 2.5}}; AX.activationPoint={187.5, 662.75}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{3, 585.5}, {369, 2.5}}; alpha=0; UIE=N>
  |  |  |--<UIButton:0x141e43b00; AX=N; AX.id='Typing Shield'; AX.label='Cancel'; AX.frame={{0, 20}, {375, 647}}; AX.activationPoint={187.5, 343.5}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{0, 20}, {375, 647}}; hidden; alpha=0>
  |  |  |--<InfoBarContainerView:0x141d69660; AX=N; AX.frame={{0, 667}, {375, 0}}; AX.activationPoint={187.5, 667}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 667}, {375, 0}}; opaque; alpha=1>
  |  |  |--<ToolbarView:0x141d49cf0; AX=N; AX.id='kToolbarIdentifier'; AX.frame={{0, 0}, {375, 76}}; AX.activationPoint={187.5, 38}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{0, 0}, {375, 76}}; opaque; alpha=1>
  |  |  |  |--<UIImageView:0x141d4a0f0; AX=N; AX.frame={{0, 0}, {375, 76}}; AX.activationPoint={187.5, 38}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{0, 0}, {375, 76}}; alpha=1>
  |  |  |  |--<ToolbarToolsMenuButton:0x141d4aa10; AX=Y; AX.id='kToolbarToolsMenuButtonIdentifier'; AX.label='Menu'; AX.frame={{331, 24}, {44, 48}}; AX.activationPoint={353, 48}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{331, 24}, {44, 48}}; alpha=1>
  |  |  |  |  |--<UIImageView:0x141dad2f0; AX=N; AX.id='toolbar_tools'; AX.frame={{344.5, 36}, {14, 24}}; AX.activationPoint={351.5, 48}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{13.5, 12}, {14, 24}}; alpha=1; UIE=N>
  |  |  |  |--<UIImageView:0x141d4e090; AX=N; AX.frame={{0, 76}, {375, 2}}; AX.activationPoint={187.5, 77}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{0, 76}, {375, 2}}; alpha=1; UIE=N>
  |  |  |  |--<UIImageView:0x141d4e9b0; AX=N; AX.frame={{0, 76}, {375, 10}}; AX.activationPoint={187.5, 81}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{0, 76}, {375, 10}}; alpha=0; UIE=N>
  |  |  |  |--<ToolbarCenteredButton:0x141d51490; AX=Y; AX.id='kToolbarStackButtonIdentifier'; AX.label='Show Tabs'; AX.value='1'; AX.frame={{285, 24}, {48, 48}}; AX.activationPoint={309, 48}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{285, 24}, {48, 48}}; alpha=1>
  |  |  |  |  |--<UIImageView:0x141dad110; AX=N; AX.frame={{297, 36}, {24, 24}}; AX.activationPoint={309, 48}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{12, 12}, {24, 24}}; alpha=1; UIE=N>
  |  |  |  |  |--<UIButtonLabel:0x141d51950; AX=Y; AX.label='1'; AX.frame={{285, 24}, {48, 48}}; AX.activationPoint={309, 48}; AX.traits='UIAccessibilityTraitStaticText'; AX.focused='N'; frame={{0, 0}, {48, 48}}; alpha=1; UIE=N; text='1'>
  |  |  |  |--<UIView:0x141e45910; AX=N; AX.frame={{0, 20}, {285, 56}}; AX.activationPoint={142.5, 48}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 20}, {285, 56}}; opaque; alpha=1>
  |  |  |  |  |--<UIButton:0x141d540a0; AX=Y; AX.id='Back'; AX.label='Back'; AX.frame={{0, 24}, {48, 48}}; AX.activationPoint={24, 48}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{0, 4}, {48, 48}}; alpha=1>
  |  |  |  |  |  |--<UIImageView:0x141dacf30; AX=N; AX.frame={{16.5, 36}, {24, 24}}; AX.activationPoint={28.5, 48}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{16.5, 12}, {24, 24}}; alpha=1; UIE=N>
  |  |  |  |  |--<UIButton:0x141d54560; AX=Y; AX.id='Forward'; AX.label='Forward'; AX.frame={{48, 24}, {48, 48}}; AX.activationPoint={72, 48}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{48, 4}, {48, 48}}; alpha=1>
  |  |  |  |  |  |--<UIImageView:0x141dacd50; AX=N; AX.frame={{56.5, 36}, {24, 24}}; AX.activationPoint={68.5, 48}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{8.5, 12}, {24, 24}}; alpha=1; UIE=N>
  |  |  |  |  |--<UIView:0x141d54820; AX=N; AX.frame={{0, 0}, {381, 76}}; AX.activationPoint={190.5, 38}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, -20}, {381, 76}}; opaque; alpha=1; UIE=N>
  |  |  |  |  |  |--<UIImageView:0x141d53790; AX=N; AX.frame={{95, 27}, {190, 43}}; AX.activationPoint={190, 48.5}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{95, 27}, {190, 43}}; alpha=1; UIE=N>
  |  |  |  |  |--<OmniboxTextFieldIOS:0x142813c00; AX=N; AX.id='Address'; AX.label='Address and search bar'; AX.value='localhost:8080/forward/'; AX.frame={{95, 27}, {190, 43}}; AX.activationPoint={190, 48.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{95, 7}, {190, 43}}; alpha=1; text='localhost:8080/forward/'>
  |  |  |  |  |  |--<UITextFieldLabel:0x141d51bf0; AX=Y; AX.label='localhost:8080/forward/'; AX.frame={{105, 27}, {176, 43}}; AX.activationPoint={193, 48.5}; AX.traits='UIAccessibilityTraitStaticText'; AX.focused='N'; frame={{10, 0}, {176, 43}}; alpha=1; UIE=N; text='localhost:8080/forward/'>
  |  |  |  |  |  |--<UIAccessibilityTextFieldElement:0x17445ca70; AX=Y; AX.label='Address and search bar'; AX.value='localhost:8080/forward/'; AX.frame={{95, 27}, {190, 43}}; AX.activationPoint={190, 48.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'>
  |  |  |  |  |--<UIButton:0x14391d470; AX=N; AX.label='Cancel'; AX.frame={{327, 24}, {40, 48}}; AX.activationPoint={347, 48}; AX.traits='UIAccessibilityTraitButton'; AX.focused='N'; frame={{327, 4}, {40, 48}}; hidden; alpha=0>
  |  |  |  |  |  |--<UIImageView:0x141ebf690; AX=N; AX.id='collapse'; AX.frame={{335, 36}, {24, 24}}; AX.activationPoint={347, 48}; AX.traits='UIAccessibilityTraitImage'; AX.focused='N'; frame={{8, 12}, {24, 24}}; alpha=1; UIE=N>
  |  |  |  |--<MDCProgressView:0x141e48a00; AX=Y; AX.value='100%'; AX.frame={{0, 74}, {375, 2}}; AX.activationPoint={187.5, 75}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 74}, {375, 2}}; opaque; hidden; alpha=1>
  |  |  |  |  |--<UIView:0x141e490a0; AX=N; AX.frame={{0, 76}, {375, 0}}; AX.activationPoint={187.5, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 2}, {375, 0}}; opaque; alpha=1>
  |  |  |  |  |--<UIView:0x141e49240; AX=N; AX.frame={{0, 76}, {375, 0}}; AX.activationPoint={187.5, 76}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 2}, {375, 0}}; opaque; alpha=1>
  |--<MDCOverlayWindowContainerView:0x141e15230; AX=N; AX.frame={{0, 0}, {375, 667}}; AX.activationPoint={187.5, 333.5}; AX.traits='UIAccessibilityTraitNone'; AX.focused='N'; frame={{0, 0}, {375, 667}}; opaque; hidden; alpha=1>


2016-12-26 08:37:42.973798 ios_chrome_web_egtests[42648:22257397] View is moving to nil window. Skipping viewWillDisappear state tracking.