Revert "[css-text] New value 'break-spaces' for the white-space property"

This reverts commit a07642661ef7ff08c156e90394504a3a40afc9ea.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 623324 as the
culprit for failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtL2EwNzY0MjY2MWVmN2ZmMDhjMTU2ZTkwMzk0NTA0YTNhNDBhZmM5ZWEM

Sample Failed Build: https://ci.chromium.org/buildbot/chromium.win/Win%20x64%20Builder/60550

Sample Failed Step: compile

Original change's description:
> [css-text] New value 'break-spaces' for the white-space property
> 
> Finally the CSS WG decided [1] to move back the 'break-spaces' value to
> the 'white-space' property. This makes the parsing logic easier than
> the previous approach of using the 'overflow-wrap' property.
> 
> This new value prevents the white-space sequence to collapse and gives
> breaking opportunities after every preserved white-space.
> 
> https://drafts.csswg.org/css-text-3/#valdef-white-space-break-spaces
> 
> Additionally, unlike 'pre-wrap', non-collapsible spaces or tabs at the
> end of a line cannot be hung or visually collapsed, since we want them
> to be preserved and broken.
> 
> [1] https://github.com/w3c/csswg-drafts/pull/2841
> 
> Bug: 767634
> Change-Id: I55e888d4472de11c64c4b14e2710c6e3d1832e67
> Reviewed-on: https://chromium-review.googlesource.com/c/1136543
> Reviewed-by: Koji Ishii <kojii@chromium.org>
> Commit-Queue: Javier Fernandez <jfernandez@igalia.com>
> Cr-Commit-Position: refs/heads/master@{#623324}

Change-Id: If430ec5653a3e50bc3711fa94f6b535589270b0c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 767634
Reviewed-on: https://chromium-review.googlesource.com/c/1415914
Cr-Commit-Position: refs/heads/master@{#623339}
26 files changed