sdy@, do you think this recent CL could have caused this failure?  https://codereview.chromium.org/2610923005

content_shell_test_apk failing on chromium.android/Lollipop Tablet Tester

Builders failed on: 
- Lollipop Tablet Tester: 
  https://build.chromium.org/p/chromium.android/builders/Lollipop%20Tablet%20Tester

This build failed: https://uberchromegw.corp.google.com/i/chromium.android/builders/Lollipop%20Tablet%20Tester/builds/7938


C  223.762s Main  [FAIL] org.chromium.content.browser.ContentViewCoreSelectionTest#testPastePopupClearedOnLongPressingOutsideInput:
C  223.762s Main  junit.framework.AssertionFailedError: Values did not match. Expected: true, actual: false
C  223.762s Main  	at junit.framework.Assert.fail(Assert.java:50)
C  223.762s Main  	at junit.framework.Assert.assertTrue(Assert.java:20)
C  223.762s Main  	at org.chromium.content.browser.test.util.CriteriaHelper.pollInstrumentationThread(CriteriaHelper.java:79)
C  223.762s Main  	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:117)
C  223.762s Main  	at org.chromium.content.browser.test.util.CriteriaHelper.pollUiThread(CriteriaHelper.java:138)
C  223.762s Main  	at org.chromium.content.browser.ContentViewCoreSelectionTest.waitForPastePopupStatus(ContentViewCoreSelectionTest.java:858)
C  223.762s Main  	at org.chromium.content.browser.ContentViewCoreSelectionTest.testPastePopupClearedOnLongPressingOutsideInput(ContentViewCoreSelectionTest.java:205)
C  223.763s Main  	at java.lang.reflect.Method.invoke(Native Method)
C  223.763s Main  	at java.lang.reflect.Method.invoke(Method.java:372)
C  223.763s Main  	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
C  223.763s Main  	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
C  223.763s Main  	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:52)
C  223.763s Main  	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
C  223.763s Main  	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
C  223.763s Main  	at org.chromium.base.test.ScreenshotOnFailureStatement.evaluate(ScreenshotOnFailureStatement.java:37)
C  223.763s Main  	at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55)
C  223.763s Main  	at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270)
C  223.763s Main  	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
C  223.763s Main  	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
C  223.763s Main  	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
C  223.763s Main  	at org.chromium.base.test.BaseJUnit4ClassRunner.runChild(BaseJUnit4ClassRunner.java:135)
C  223.763s Main  	at org.chromium.base.test.BaseJUnit4ClassRunner.runChild(BaseJUnit4ClassRunner.java:36)
C  223.763s Main  	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
C  223.763s Main  	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
C  223.763s Main  	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
C  223.763s Main  	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
C  223.763s Main  	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
C  223.763s Main  	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
C  223.763s Main  	at org.junit.runners.Suite.runChild(Suite.java:128)
C  223.763s Main  	at org.junit.runners.Suite.runChild(Suite.java:27)
C  223.763s Main  	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
C  223.763s Main  	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
C  223.763s Main  	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
C  223.763s Main  	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
C  223.763s Main  	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
C  223.763s Main  	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
C  223.763s Main  	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
C  223.763s Main  	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
C  223.763s Main  	at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
C  223.763s Main  	at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
C  223.763s Main  	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1853)