import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1180189 - Fix crash in mozilla::a11y::HTMLTableRowAccessible::GroupPosition, r=MarcoZ (a2ee5f2df8)
- Bug 1194859 - crash in mozilla::a11y::ARIAGridCellAccessible::GroupPosition, r=marcoz (879bad005f)
- Bug 1194859 - crash in mozilla::a11y::ARIAGridCellAccessible::GroupPosition(), part2, r=marcoz (38193050c0)
- comment and style (a3ae06e5e6)
- var/let (7b3552e2ba)
- var-let and some misspatch fixes (a6d3b0c9cb)
- Bug 1141978 - Support rowgroup and colgroup HTML scope, r=marcoz (11eedb88f0)
- Bug 1146257 - spanned headers don't work well in our table code, r=marcoz (d9b11584c2)
- remove unused MultiCompartmentMatcher (480d895553)
- Bug 1168170 - Mark reference counted members of nsTimerImpl::mCallback as MOZ_OWNING_REF. r=froydnj (b84c55460a)
- Bug 1178363 - make nsTimerImpl::SetDelayInternal a private method; r=poiru (5f70ed869e)
- Bug 1178363 - make nsTimerImpl::Fire a private method; r=poiru (4b6007c376)
- Bug 1178363 - make MOZ_TASK_TRACER-dependent bits of nsTimerImpl private; r=poiru (e1f54cde97)
- Bug 1178363 - make nsTimerImpl::PostTimerEvent a private method; r=poiru (0a0b71eae3)
- Bug 1178363 - make nsTimerImpl::GetGeneration a private method; r=poiru (593d3a3f2d)
- Bug 1059572 - Part 0: Fuzz test for timers. r=nfroyd (7b03728aa4)
- Bug 1059572 - Part 0.5: Fixes for pre-existing problems in TestTimers. r=nfroyd (e463afc995)
- Bug 1059572 - Part 1: Move PostTimerEvent to TimerThread to allow TimerThread's monitor to protect it. r=nfroyd (5e56ce272a)
- Bug 1059572 - Part 2: Make absolutely sure a timer is removed before reinitting it. r=nfroyd (7d916a9aa9)
- Bug 1190735 - Remove nsITimer.TYPE_REPEATING_PRECISE. r=froydnj. (34f7e4c02e)
- Bug 1203427 (part 5) - Add logging of timer firings. r=froydnj. (664954eef7)

layout/base/nsPresShell.cpp

@@ -1760,9 +1760,9 @@ PresShell::Initialize(nscoord aWidth, nscoord aHeight)
         Preferences::GetInt("nglayout.initialpaint.delay",
                             PAINTLOCK_EVENT_DELAY);
 
-      mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback,
-                                                   this, delay,
-                                                   nsITimer::TYPE_ONE_SHOT);
+      mPaintSuppressionTimer->InitWithNamedFuncCallback(
+        sPaintSuppressionCallback, this, delay, nsITimer::TYPE_ONE_SHOT,
+        "PresShell::sPaintSuppressionCallback");
     }
   }