Web Inspector: Source View doesn't scroll to show line when breakpoint is hit inside...

Web Inspector: Source View doesn't scroll to show line when breakpoint is hit inside of <script> in HTML resource
https://bugs.webkit.org/show_bug.cgi?id=189638
<rdar://problem/43359278>

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2018-09-14
Reviewed by Matt Baker.

Pausing in Document resources on page load have special considerations where we
may not receive their full content immediately, so we may synthesize inline script
content for the resource until we have full content. Unfortunately, when we get
full content and update the TextEditor we were losing the revealed position and
other editor information. This change specifically targets those cases, by
re-applying editor state when updating such a resource from partial to full content.

* UserInterface/Views/SourceCodeTextEditor.js:
(WI.SourceCodeTextEditor.prototype._contentAvailable):
Signal to the editor that when updating the content it should carry
over editor state. Only do this if we had partial content before.

* UserInterface/Views/TextEditor.js:
(WI.TextEditor):
(WI.TextEditor.prototype.set repeatReveal):
Provide a way to signal we should restore state when update the content.

(WI.TextEditor.set string.update):
(WI.TextEditor.prototype.set string):
When repeatReveal was enabled, restore editor state such as the
revealed location and text selection.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@236028 268f45cc-cd09-0410-ab3c-d52691b4dbfc