scheduler: Fix TaskTypeToString for kInternalAccessibility

Bug: 830489
Change-Id: Ief2540485aa699a72ad9adccafa487a729e7fb08
Reviewed-on: https://chromium-review.googlesource.com/1015441Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551515}

third_party/blink/renderer/platform/scheduler/main_thread/main_thread_scheduler_impl.cc

@@ -184,7 +184,7 @@ const char* TaskTypeToString(TaskType task_type) {
     case TaskType::kInternalAnimation:
       return "InternalAnimation";
     case TaskType::kInternalAccessibility:
-      return "InternalAnimation";
+      return "InternalAccessibility";
     case TaskType::kCount:
       return "Count";
   }