Figure out why local build of WebApk cannot use ChildProcessServiceImpl via reflection

I get this error when I start a locally built WebAPK. I assume that this is because the signature does not match. Figuring this out is important if we want to expose something similar to WebApkSandboxedProcessService to non Chrome browsers

V/cr_WebApkSandboxedProcessService( 9140): Unable to create a ChildProcessServiceImpl for the WebAPK.
V/cr_WebApkSandboxedProcessService( 9140): java.lang.NoSuchMethodException: create [class android.content.Context, class android.content.Context]
V/cr_WebApkSandboxedProcessService( 9140):      at java.lang.Class.getMethod(Class.java:664)
V/cr_WebApkSandboxedProcessService( 9140):      at java.lang.Class.getMethod(Class.java:643)
V/cr_WebApkSandboxedProcessService( 9140):      at org.chromium.webapk.shell_apk.WebApkSandboxedProcessService.onCreate(WebApkSandboxedProcessService.java:42)
V/cr_WebApkSandboxedProcessService( 9140):      at android.app.ActivityThread.handleCreateService(ActivityThread.java:2761)
V/cr_WebApkSandboxedProcessService( 9140):      at android.app.ActivityThread.access$1800(ActivityThread.java:151)
V/cr_WebApkSandboxedProcessService( 9140):      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1386)
V/cr_WebApkSandboxedProcessService( 9140):      at android.os.Handler.dispatchMessage(Handler.java:102)
V/cr_WebApkSandboxedProcessService( 9140):      at android.os.Looper.loop(Looper.java:135)
V/cr_WebApkSandboxedProcessService( 9140):      at android.app.ActivityThread.main(ActivityThread.java:5254)
V/cr_WebApkSandboxedProcessService( 9140):      at java.lang.reflect.Method.invoke(Native Method)
V/cr_WebApkSandboxedProcessService( 9140):      at java.lang.reflect.Method.invoke(Method.java:372)
V/cr_WebApkSandboxedProcessService( 9140):      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
V/cr_WebApkSandboxedProcessService( 9140):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)