Revert 164652 - speculative revert - this change may have caused print dialog test failures on XP.

Revert 164652 - speculative revert - this change may have caused print dialog test failures on XP.
Re-vamped the entire window auto positioning logic

As long as the user did not move / resize the window:

A single visible window (browser / app) on the screen will always be centered.
When a second visible (browser / app) window joins in, both will be pushed into opposite corners.
When more windows get piled up, they go every time into the opposite side of the currently active window.

When the user has resized / moved a window, it will be treated as a visible (browser / app) window, but it will not get moved - the others will however.


Addressing bug: Moving last remaining tabbed window back into screen center


BUG=153431, 150879, 153302
TEST=unit-tests & visual

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=164352

Review URL: https://chromiumcodereview.appspot.com/11085053

TBR=skuhne@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=164772