The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e6caa144263a64b3a6ce502b3da7edad5b3705af

commit e6caa144263a64b3a6ce502b3da7edad5b3705af
Author: Takeshi Yoshino <tyoshino@chromium.org>
Date: Wed Sep 06 09:19:27 2017

Mark a layout test http/tests/cache/zero-length-xhr.html as flaky (crashing)

Bug: 762399
Change-Id: I830a867e3f14c9a38c246b21afd14a191a83c256
No-try: true
Reviewed-on: https://chromium-review.googlesource.com/651614
Commit-Queue: Takeshi Yoshino <tyoshino@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#499914}
[modify] https://crrev.com/e6caa144263a64b3a6ce502b3da7edad5b3705af/third_party/WebKit/LayoutTests/TestExpectations

If I am looking at the right thing, not much to do with the cache?

STDERR: 09-06 11:37:33.958   747   747 E dalvikvm: JNI posting fatal error: Native registration unable to find class 'android/debug/JNITest'; aborting...
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm: "main" prio=5 tid=1 NATIVE
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   | group="main" sCount=0 dsCount=0 obj=0x41578ca8 self=0x414b2408
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   | sysTid=747 nice=0 sched=0/0 cgrp=default handle=1074200916
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   | state=R schedstat=( 0 0 0 ) utm=22 stm=6 core=0
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #00  pc 0000132e  /system/lib/libcorkscrew.so (unwind_backtrace_thread+29)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #01  pc 00060652  /system/lib/libdvm.so (dvmDumpNativeStack(DebugOutputTarget const*, int)+33)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #02  pc 00054640  /system/lib/libdvm.so (dvmDumpThreadEx(DebugOutputTarget const*, Thread*, bool)+395)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #03  pc 000546ae  /system/lib/libdvm.so (dvmDumpThread(Thread*, bool)+25)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #04  pc 000490c0  /system/lib/libdvm.so
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #05  pc 00001fa8  /system/lib/libnativehelper.so (jniRegisterNativeMethods+39)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #06  pc 0004cd22  /system/lib/libandroid_runtime.so
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #07  pc 0004d010  /system/lib/libandroid_runtime.so (android::AndroidRuntime::startReg(_JNIEnv*)+23)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #08  pc 0004da60  /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+183)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #09  pc 0000105a  /system/bin/app_process
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   #10  pc 0000e348  /system/lib/libc.so (__libc_init+47)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   at dalvik.system.NativeStart.main(Native Method)
STDERR: 09-06 11:37:33.958   747   747 I dalvikvm:   at dalvik.system.NativeStart.main(Native Method)

I don't think the network stack team maintains any layout tests.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cefd507219b67a158c1deda87892f878e68f0814

commit cefd507219b67a158c1deda87892f878e68f0814
Author: Quinten Yearsley <qyearsley@chromium.org>
Date: Wed May 16 23:29:57 2018

Remove flaky TestExpectations for tests which appear non-flaky recently.

This change was made by the update-test-expectations script.

Recent test results history:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests&tests=http/tests/appcache/abort-cache-onchecking-resource-404.html,http/tests/d
om/create-contextual-fragment-from-svg-document-range.html,http/tests/cache/zero-length-xhr.html

Bug: 762008, 762399, 762423
Change-Id: If563520cb19cc426ddf93581570cfb3d4b76f7d5
Reviewed-on: https://chromium-review.googlesource.com/1062601
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Quinten Yearsley <qyearsley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559332}
[modify] https://crrev.com/cefd507219b67a158c1deda87892f878e68f0814/third_party/WebKit/LayoutTests/TestExpectations