support application specific GCM thottling threshold

[GoogleCodeExporter]

What steps will reproduce the problem?

1. send many messages via GCM in a short time
at some point they will be throttled / buffered.


What is the expected output? What do you see instead?

The behavior is exactly as expected and documented. However, there are 
situations in which this one-size-fits-all approach is not good. My application 
for instance uses GCM to execute a user triggered action (e.g. play a song) on 
an Android phone. So the user is basically responsible for the amount of 
messages and throttling it will simply render the app broken. 

Is there a way to adjust this threshold for a specific application?




What version of the product are you using? On what operating system?


Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 24 Jun 2014 at 12:42