renderer process does not call OnBeforeCommandLineProcessing

[YogeshTembe]

I want to add/modify/remove command line arguments in renderer process ( sub-process having --type=renderer ).

1)renderer process is created by zygote process.
zygote process is calling "OnBeforeCommandLineProcessing" but renderer process is not calling "OnBeforeCommandLineProcessing". why is that ?

2)Does renderer process pick flags from zygote process itself ? So it will pick intial flags or it will pick the flags modified after "OnBeforeCommandLineProcessing" ?

3)The few flags in renderer process are not there when process comes in "OnBeforeChildProcessLaunch" function but later if we list running processes then they show up.
Is there any other method available to add/modify/remove commandline arguments of renderer process ?

Please let me know if anyone has worked on render process command line flags. Thanks.