Reapply 266653 "[Mac] Allow fullscreen transitions while constrai..."

Reapply 266653 "[Mac] Allow fullscreen transitions while constrai..."

PrintPreviewTest.TaskManagerNewPrintPreview was something else's fault.

> Revert 266653 "[Mac] Allow fullscreen transitions while constrai..."
> 
> Mac Tests (dbg) failing for PrintPreviewTest.TaskManagerNewPrintPreview
> http://build.chromium.org/p/chromium.mac/builders/Mac%2010.7%20Tests%20%28dbg%29%281%29/builds/23012
> 
> 
> > [Mac] Allow fullscreen transitions while constrained windows are open.
> > 
> > r166410 disabled the browser from entering fullscreen mode when any one
> > tab has a constrained window open (e.g., Print dialog).  However, this
> > is inconsistent with the behavior on all other desktop platforms.  This
> > change removes the restriction.
> > 
> > Landing on behalf of miu@chromium.org manually, as to make a branch cut.
> > 
> > BUG=366567, 146451
> > TEST=Repro steps in bug 366567 (easier to understand from the multiple demo videos).  Also, manual testing of browser transition into and out of fullscreen before/after a print dialog is open.
> > R=avi@chromium.org, sky@chromium.org
> > 
> > Review URL: https://codereview.chromium.org/253493005
> 
> TBR=avi@chromium.org
> 
> Review URL: https://codereview.chromium.org/252693007

TBR=ajwong@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266899

[awong, 2014-04-29 16:51:32]

Committed patchset #1 manually as r266899.