Revert of [TextBlob] Fall back to TightRunBounds when the font bounds are empty (patchset #1 id:1 of https://codereview.chromium.org/1284693002/ )

Reason for revert:
Breaking DEPS roll on Assert in SkTextBlobBuilder::TightRunBounds.

Original issue's description:
> [TextBlob] Fall back to TightRunBounds when the font bounds are empty
>
> Empty font bounds are likely an indication of a font bug.  As a best
> effort, we can use TightRunBounds in this easily detectable case.
>
> BUG=507022
> R=reed@google.com,bungeman@google.com
>
> Committed: https://skia.googlesource.com/skia/+/d6b99cc6b84b3ec864221cbe9945d203bd9eb072

TBR=bungeman@google.com,reed@google.com,fmalita@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=507022

Review URL: https://codereview.chromium.org/1283853002
1 file changed