bug#21415: 25.0.50; Emacs Trunk -- pixelwise width/height for x-create-frame

[Keith David Bershatsky]

The following are results of my tests with `emacs-repository-version` 
"ffa41ad2a02dbd1202d71a08bac34831f25662d0" built this evening (October 28, 
2015).

Starting from Emacs -Q, and then turning off the toolbar using the mouse by 
clicking the option in the menubar, the frame shrinks slightly. Clicking the 
toolbar option again restores the frame to its original position.

`M-x toggle-frame-maximized` results in a frame properly maximized.

The first time I turned off the toolbar from a maximized frame, the frame 
shrunk a little.  When I turned the toolbar back on again, the frame did not 
return to a maximized position -- i.e., it remained a few pixels shy of 
full-screen in terms of height.  When I turned the toolbar off again, the main 
window reduced in size and the height of the echo area increased to about 3 
lines in height -- the frame remained the same size.  When I turned the toolbar 
on again, the main window returned to its prior size and the echo area returned 
to a size of just one line -- the frame stayed the same size (i.e., a few 
pixels shy of full-screen in terms of height).

Keith