Remove Battery Status API from the tree
Because it's a privacy (tracking and fingerprinting) risk (https://blog.lukaszolejnik.com/battery-status-readout-as-a-privacy-risk/) Apple never enabled it on their ports.
Mozilla tried to fix it (https://bugzilla.mozilla.org/show_bug.cgi?id=1124127), and then Mozilla decided it wasn't worth keeping around for web content (https://bugzilla.mozilla.org/show_bug.cgi?id=1313580)
The Linux port maintainers don't see a reason to keep it around, as discussed in this thread - https://lists.webkit.org/pipermail/webkit-dev/2016-October/028468.html
I'll use this bug to remove it in a few days as long as the thread continues to have no objections.
Created attachment 293436 [details]
Created attachment 293440 [details]
Created attachment 293442 [details]
Attachment 293442 [details] did not pass style-queue:
ERROR: Source/WebCore/ChangeLog:8: You should remove the 'No new tests' and either add and list tests, or explain why no new tests were possible. [changelog/nonewtests] 
Total errors found: 1 in 6 files
If any of these errors are false positives, please file a bug against check-webkit-style.
We should wait a few days to do this to give people a fair chance to voice objections.
There's no rush.