It's not a bug. The tab has changed place.
Now it can be found near the "File system" and "Snippets" 

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 Issue 827868  has been merged into this issue.

On the plus side, we can still invoke it via Ctrl-Shift-F hotkey. But the new placement is problematic in case a long string is used for searching because the sub-panel is very narrow so all found lines will look exactly the same. Resizing the sub-panel manually is inconvenient because it'll subtract from the main content screen estate while the other sub-panels don't need the extra width. The old placement didn't have this problem. A possible solution would be to add a button to promote the search results into a separate top panel.

Thanks for filing the issue!

@Reporter: From your comment#1 it is understood that the issue is no longer seen. Could you please let us know if we can close this issue.

Yes it can be closed. It's not a bug after all.
But it's a bad change and should be undone since it's bad for developers.
Also, this kind of change should be reported in the "What's new" tab, 
in order to avoid this kind of miss report.

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Thank you for your feedback. We are still iterating on the final UI, expect changes soon.

Functions as expected