The xr.webvr.live.static benchmark seems to have started flakily crashing a while back, particularly on the with.in sites. Unfortunately, the tests are run on builds that are as close to official builds as possible, meaning that we can't get a whole lot of useful information from the crashes. Additionally, trying to add logging to get more information seems to make the issue go away, as does changing to a debug build.

The following stack traces are from one of the runs on the bot:

[FATAL:jni_android.cc(259)] Please include Java exception stack in crash report
	signal 6 (SIGABRT), code -6 in tid 6663 (chromium.chrome)
	pid: 6663, tid: 6663, name: chromium.chrome  >>> org.chromium.chrome <<<
	signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
	[FATAL:jni_android.cc(259)] Please include Java exception stack in crash report
	     r0 00000000  r1 00001a07  r2 00000006  r3 00000008
	     r4 f39e858c  r5 00000006  r6 f39e8534  r7 0000010c
	     r8 ffd9970d  r9 ffd9970c  sl ffd99b68  fp ffd99b64
	     ip 0000000b  sp ffd99698  lr f13b05c7  pc f13b2e30
	
	Stack Trace:
	  RELADDR   FUNCTION                                          FILE:LINE
	  00049e30  <UNKNOWN>                                         /system/lib/libc.so
	  000475c3  <UNKNOWN>                                         /system/lib/libc.so
	  0001d635  <UNKNOWN>                                         /system/lib/libc.so
	  00019181  <UNKNOWN>                                         /system/lib/libc.so
	  00017048  <UNKNOWN>                                         /system/lib/libc.so
	  0060dec7  base::debug::(anonymous namespace)::DebugBreak()  ../../base/debug/debugger_posix.cc:228:5
	
	Java stderr from crashing pid (may identify underlying Java exception):
	java.lang.NullPointerException: Attempt to write to field 'int aui.h' on a null object reference
	  at auw.onLargeIconAvailable(PG:1128)
	  at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
	  at org.chromium.base.SystemMessageHandler.handleMessage(PG:51)
	  at android.os.Handler.dispatchMessage(Handler.java:102)
	  at android.os.Looper.loop(Looper.java:154)
	  at android.app.ActivityThread.main(ActivityThread.java:6121)
	  at java.lang.reflect.Method.invoke(Native Method)
	  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
	  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)