Steps to reproduce the problem:
1. Have android app with web view
2. Register your crash handler - Thread.setDefaultUncaughtExceptionHandler(sExceptionHandler);
3. Use custom WebViewClient for the web view - override shouldOverrideUrlLoading - throw an exception here
4. Open any page click on any link

What is the expected behavior?
App crashes and the sExceptionHandler is called

What went wrong?
sExceptionHandler is not called

this log statement is generated:
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ java.lang.IllegalStateException: TEST
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at my.WebViewClient.shouldOverrideUrlLoading(WebViewClient.java:138)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.webview.chromium.WebViewContentsClientAdapter.shouldOverrideUrlLoading(WebViewContentsClientAdapter.java:293)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(AwContentsClientBridge.java:96)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:27)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:102)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at android.os.Looper.loop(Looper.java:146)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5694)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:515)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
05-16 13:37:22.254  15286-15286/my.dev W/System.err﹕ at dalvik.system.NativeStart.main(Native Method)
05-16 13:37:22.259  15286-15286/my.dev A/libc﹕ Fatal signal 6 (SIGABRT) at 0x00004c0c (code=-6), thread 15286 (my.dev)

Crashed report ID: 

How much crashed? Whole browser

Is it a problem with a plugin? No 

Did this work before? No 

Chrome version: 50.0.2661.75  Channel: stable
OS Version: System web view - 50.0.2661.86
Flash Version: 

This way our custom handling is not happening for any crash that happens in web view or in our code that is called from the web view.
shouldOverrideUrlLoading is called on Main thread, and the Thread.currentTherad().getUncaughtExceptionHandler() returns the expected ExceptionHandler

Tested on Galaxy S5 mini 4.4.2 and Nexus 5X 6.0.1 - but looks like this is happening for all the devices and versions of OS and chromium web view

Probably related to https://bugs.chromium.org/p/chromium/issues/detail?id=481420

We have crash logs from shouldOverrideUrlLoading() only from Android 4.1.2 which was using the old web view