CL introduces changes in the layout of the mac demo app.
Bellow are the listed changes
* The label above the room field is removed and that text is shown in the text field's placeholder.
* Size of the window is decreased to accomodate smaller resolutions
* The local view is shown on top of remote view in 3/rd of it's size
* The log view is bellow the remote view and shows client status messages as well as some simple usage instructions.
* Loopback functionality is added
* Start call button added for improved usability
Note: This file was not following our internal ObjC style guidelines i.e
NSString *a - right
NSString* a - wrong
However I've decided to submit the changes and to follow the current style.
I'll submit a bug to update the style in separate CL
BUG=webrtc:6496
Review-Url: https://codereview.webrtc.org/2396333002
Cr-Commit-Position: refs/heads/master@{#14692}
647915fb95