Should have added that it's failing on M tablets as well:

https://uberchromegw.corp.google.com/i/chromium.android/builders/Marshmallow%20Tablet%20Tester/builds/10992

Oh, and L too:
https://uberchromegw.corp.google.com/i/chromium.android/builders/Lollipop%20Tablet%20Tester/builds/10960

Possibly more but I won't keep spamming the bug with them :)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/48a0f05641e1aafea9c98ad26dfdd2a9b40b0917

commit 48a0f05641e1aafea9c98ad26dfdd2a9b40b0917
Author: Matthew Cary <mattcary@chromium.org>
Date: Mon Dec 04 10:27:47 2017

Disable testSearchBookmarks_Delete.

Failing on KitKat tablet, see bug for details.

Bug:  791485 
TBR: twellington@chromium.org, mdjones@chromium.org
Change-Id: I1fca7a125dbb58bf352d66545ca04e022a4ed564
Reviewed-on: https://chromium-review.googlesource.com/805135
Reviewed-by: Matthew Cary <mattcary@chromium.org>
Commit-Queue: Matthew Cary <mattcary@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521302}
[modify] https://crrev.com/48a0f05641e1aafea9c98ad26dfdd2a9b40b0917/chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java

mattcary@ - in the future, please include the stack trace for the failing test. Trybot logs expire after some time, so leaving a record of the failure is important.


It looks like this is the line that's failing: assertBookmarkItems("Wrong number of items before starting search.", 3, adapter, manager);

java.lang.AssertionError: expected:<3> but was:<2>
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.failNotEquals(Assert.java:834)
	at org.junit.Assert.assertEquals(Assert.java:645)
	at org.junit.Assert.assertEquals(Assert.java:631)
	at org.chromium.chrome.browser.bookmarks.BookmarkTest.testSearchBookmarks_Delete(BookmarkTest.java:363)
	at java.lang.reflect.Method.invokeNative(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:515)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:52)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.chromium.base.test.ScreenshotOnFailureStatement.evaluate(ScreenshotOnFailureStatement.java:37)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.chromium.chrome.test.ChromeActivityTestRule$1.evaluate(ChromeActivityTestRule.java:116)
	at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55)
	at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.chromium.base.test.BaseJUnit4ClassRunner.runChild(BaseJUnit4ClassRunner.java:184)
	at org.chromium.base.test.BaseJUnit4ClassRunner.runChild(BaseJUnit4ClassRunner.java:41)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.chromium.base.test.BaseJUnit4ClassRunner.run(BaseJUnit4ClassRunner.java:166)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
	at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)
	at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)
	at org.chromium.base.test.BaseChromiumAndroidJUnitRunner.onStart(BaseChromiumAndroidJUnitRunner.java:99)
	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/411454440403418aeeb2aaf552149ee18d046c02

commit 411454440403418aeeb2aaf552149ee18d046c02
Author: Theresa Wellington <twellington@google.com>
Date: Mon Dec 04 23:45:40 2017

Reenable BookmarkTest#testSearchBookmarks_Delete

This reverts commit 48a0f05641e1aafea9c98ad26dfdd2a9b40b0917 and
re-enables the #testSearchBookmarks_Delete. In order for this test to
pass on tablets, special handling of the search state while updating the
native page's URL was added.

BUG= 791485 ,789910

Change-Id: I43133858518754fa321e563a81982432eec98b93
Reviewed-on: https://chromium-review.googlesource.com/806932
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521527}
[modify] https://crrev.com/411454440403418aeeb2aaf552149ee18d046c02/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
[modify] https://crrev.com/411454440403418aeeb2aaf552149ee18d046c02/chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java

I'm not seeing any failures since the re-enable, so marking this as "Fixed".

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/46e6ce63142a239143743d00270a62fe7d816803

commit 46e6ce63142a239143743d00270a62fe7d816803
Author: Theresa Wellington <twellington@google.com>
Date: Wed Dec 06 17:04:41 2017

Reenable BookmarkTest#testSearchBookmarks_Delete

This reverts commit 48a0f05641e1aafea9c98ad26dfdd2a9b40b0917 and
re-enables the #testSearchBookmarks_Delete. In order for this test to
pass on tablets, special handling of the search state while updating the
native page's URL was added.

BUG= 791485 ,789910

Change-Id: I43133858518754fa321e563a81982432eec98b93
Reviewed-on: https://chromium-review.googlesource.com/806932
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#521527}(cherry picked from commit 411454440403418aeeb2aaf552149ee18d046c02)
Reviewed-on: https://chromium-review.googlesource.com/810987
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/branch-heads/3282@{#58}
Cr-Branched-From: 5fdc0fab22ce7efd32532ee989b223fa12f8171e-refs/heads/master@{#520840}
[modify] https://crrev.com/46e6ce63142a239143743d00270a62fe7d816803/chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkManager.java
[modify] https://crrev.com/46e6ce63142a239143743d00270a62fe7d816803/chrome/android/javatests/src/org/chromium/chrome/browser/bookmarks/BookmarkTest.java