REGRESSION (r8412): Use RetainPtr<> for NSMutableAttributedString in -[WebAccessibilityObjectWrapper doAXAttributedStringForTextMarkerRange:spellCheck:]

[David Kilzer (:ddkilzer)]

Way back in 2005 in commit r8412, David Harrison added this line of code to WebCore/kwq/KWQAccObject.mm that was never changed to use RetainPtr<>:

    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] init];

This lack of RetainPtr<> caused a leak when Darin landed a fix for Bug 209129.

I fixed the leak in Bug 209932 by moving an early return, but Darin was curious about why this variable had never been converted:
<https://bugs.webkit.org/show_bug.cgi?id=209932#c3>

[Radar WebKit Bug Importer]

<rdar://problem/61269572>

[David Kilzer (:ddkilzer)]

Created attachment 395400 [details]
Patch v1

[David Kilzer (:ddkilzer)]

LOL!  Commit r8412 is so old that Bugzilla refuses to link it!

<https://trac.webkit.org/r8412>

[Darin Adler]

Comment on attachment 395400 [details]
Patch v1

View in context: https://bugs.webkit.org/attachment.cgi?id=395400&action=review

> Source/WebCore/accessibility/mac/WebAccessibilityObjectWrapperMac.mm:1258
> +        RetainPtr<NSMutableAttributedString> attrString = adoptNS([[NSMutableAttributedString alloc] init]);

Could just write:

    auto attrString = ...

[David Kilzer (:ddkilzer)]

Created attachment 395401 [details]
Patch for landing

[EWS]

Committed r259483: <https://trac.webkit.org/changeset/259483>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 395401 [details].