Bug 1376796 - Label the nsCaret::CaretBlinkCallback_timer. r=heycam

layout/base/nsCaret.cpp

@@ -654,8 +654,15 @@ void nsCaret::ResetBlinking()
   } else {
     nsresult  err;
     mBlinkTimer = do_CreateInstance("@mozilla.org/timer;1", &err);
-    if (NS_FAILED(err))
+    if (NS_FAILED(err)) {
       return;
+    }
+
+    if (nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell)) {
+      if (nsCOMPtr<nsIDocument> doc = presShell->GetDocument()) {
+        mBlinkTimer->SetTarget(doc->EventTargetFor(TaskCategory::Other));
+      }
+    }
   }
 
   if (blinkRate > 0) {