Question: iPhone 7  

iOS 10.1.1  

Gmail 5.0.3  

Chrome 54.0.2840.91 

When trying to open a link directly within the gmail app, it opens in safari instead of chrome. This used work just fine until the latest update of gmail. 

I looked in the gmail settings under google apps, to use the app instead of the browser. There is no option for Chrome where I imagine it should be. 

I can't find any other option to make chrome the default browser instead of safari. 

Help?

UPDATE: As of 11/26/2016, the problem seems to have been fixed. Links from my gmail app open up in chrome again.

Answer: 
I'm not sure if the following procedure is exactly what you tried, or if you did something differently – but maybe this helps anyways:

* Run the Gmail app.
* Click the little menu icon in the upper left (three parallel stripes).
* Click the Settings gear icon.
* Click "Google Apps" near the bottom (you may have to scroll down).
* Turn "Chrome" on or off at your preference. On means links will go to Chrome; off means they'll go to Safari.

…as described [here](https://discussions.apple.com/thread/6593227?start=0&tstart=0).

Update: sorry to say, but it looks like this is actually no longer possible in iOS 10: *"iOS 10 won't let you select default apps for third-party apps that handle email, calendar, web browsing, …."* (from [here](http://www.businessinsider.com/ios-10-wont-let-you-select-default-third-party-apps-2016-6?IR=T))
Problem resolved itself by as early as 11/26/2016. 

Gmail: 5.0.7
Chrome: 55.0.2883.79
iOS: 10.1.1