Revert of [Reland] Scheduler refactoring to virtually eliminate redundant DoWorks

third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc

Index: third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc b/third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc
index 8c608b09fba71a437b2d8382a6783e3f7f1cd6a6..bec08d1125db9d303c2f6487b116b1a017642460 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/work_queue_sets.cc
@@ -63,8 +63,6 @@
   size_t set_index = work_queue->work_queue_set_index();
   DCHECK_LT(set_index, work_queue_heaps_.size()) << " set_index = "
                                                  << set_index;
-  // |work_queue| should not be in work_queue_heaps_[set_index].
-  DCHECK(!work_queue->heap_handle().IsValid());
   work_queue_heaps_[set_index].insert({enqueue_order, work_queue});
 }
 
@@ -83,8 +81,6 @@
   } else {
     // O(log n)
     work_queue_heaps_[set_index].pop();
-    DCHECK(work_queue_heaps_[set_index].empty() ||
-           work_queue_heaps_[set_index].min().value != work_queue);
   }
 }
 
@@ -104,18 +100,6 @@
   if (work_queue_heaps_[set_index].empty())
     return false;
   *out_work_queue = work_queue_heaps_[set_index].min().value;
-  return true;
-}
-
-bool WorkQueueSets::GetOldestQueueAndEnqueueOrderInSet(
-    size_t set_index,
-    WorkQueue** out_work_queue,
-    EnqueueOrder* out_enqueue_order) const {
-  DCHECK_LT(set_index, work_queue_heaps_.size());
-  if (work_queue_heaps_[set_index].empty())
-    return false;
-  *out_work_queue = work_queue_heaps_[set_index].min().value;
-  *out_enqueue_order = work_queue_heaps_[set_index].min().key;
   return true;
 }