DevTools: simplify WI.FormattedContentBuilder
The WI.FormattedContentBuilder has a functionality that preserves the
originaly entered new lines. This patch removes this functionality
in order to simplify the internal code.
As of today, nobody really benefits from the functionality. The
pretty-printers should maximize for beauty, thus should not respect
originally entered newlines.
BUG=none
R=dgozman, pfeldman
Committed:
https://crrev.com/a3aa8c5a90ecf364c444e75fa90044fa18c5f165
Cr-Commit-Position: refs/heads/master@{#383598}