Able to reproduce the issue on Mac 10.12.4, Win-10 and Ubuntu 14.04 using chrome reported version #58.0.3029.110 and latest canary #60.0.3100.0.

This is a non-regression issue as it is observed from M30 old builds. 

Hence, marking it as untriaged to get more inputs from dev team.

Thanks...!!

So is this wontfix or?....

Can someone please take a look at this, split screen users would appreciate and benefit from this being fixed

Firefox 57 was released this week and behaves the same way as Edge when in split screen, which leaves Chrome as the only one that has this wasted/unused space above the tabs when in split screen. Please, someone at least bring this to the attention of the relevant people. That space can and should be used for webpage content when Chrome is in split screen!

Are windows unmovable (effectively maximized) in split screen mode?  I don't even know how split screen works.

If so, it seems reasonable to use the maximized frame here.

Because of the Chrome Refresh, this is even easier to do now. On Windows, Edge and Firefox have no drag space on top, so using that drag space is the standard, expected behavior on Windows. 

(Also I wish I could rename this bug because it's not only about wasted vertical space, it's also about the ability to click on tabs at the very top of the screen when a Chrome window is in split-screen, just as you can when browser windows are maximized. At the moment, only Edge allows this in split-screen, Firefox has to fix something before this is possible)

Deleted: chrome split screen.png 249 KB

	chrome split screen.png 249 KB View Download

**UI mass Triage**

Still able to reproduce the issue on all OS using chrome latest versions as per steps in C#0 & C#7.
Hence adding appropriate labels.
Thanks..!