Bug 1348236 - label nsAutoScrollTimer for nsSelection. r=heycam

MozReview-Commit-ID: pUfQwRsecx

--HG--
extra : rebase_source : 1ff474affc0bfd5c8911731badc6b87815d434ff

layout/generic/nsSelection.cpp

@@ -268,6 +268,8 @@ public:
     if (!mTimer) {
       nsresult result;
       mTimer = do_CreateInstance("@mozilla.org/timer;1", &result);
+      mTimer->SetTarget(
+        mPresContext->Document()->EventTargetFor(TaskCategory::Other));
 
       if (NS_FAILED(result)) {
         return result;