Revert of [scheduler] Split suspendable tq from unthrottled tq.

third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
index 6b5f081066b16edfbb556cb37ec813b3bdd156d5..b6a266b135e7ec98221e6932e36902f0b438db04 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
@@ -74,11 +74,6 @@
     unthrottled_task_queue_->SetBlameContext(nullptr);
   }
 
-  if (suspendable_task_queue_) {
-    suspendable_task_queue_->UnregisterTaskQueue();
-    suspendable_task_queue_->SetBlameContext(nullptr);
-  }
-
   if (parent_web_view_scheduler_) {
     parent_web_view_scheduler_->Unregister(this);
 
@@ -167,23 +162,6 @@
   return timer_web_task_runner_;
 }
 
-RefPtr<blink::WebTaskRunner> WebFrameSchedulerImpl::suspendableTaskRunner() {
-  DCHECK(parent_web_view_scheduler_);
-  if (!suspendable_web_task_runner_) {
-    // TODO(altimin): Split FRAME_UNTHROTTLED into FRAME_UNTHROTTLED and
-    // FRAME_UNSUSPENDED.
-    suspendable_task_queue_ = renderer_scheduler_->NewTimerTaskRunner(
-        TaskQueue::QueueType::FRAME_UNTHROTTLED);
-    suspendable_task_queue_->SetBlameContext(blame_context_);
-    suspendable_web_task_runner_ =
-        WebTaskRunnerImpl::create(suspendable_task_queue_);
-    suspendable_queue_enabled_voter_ =
-        suspendable_task_queue_->CreateQueueEnabledVoter();
-    suspendable_queue_enabled_voter_->SetQueueEnabled(!frame_suspended_);
-  }
-  return suspendable_web_task_runner_;
-}
-
 RefPtr<blink::WebTaskRunner> WebFrameSchedulerImpl::unthrottledTaskRunner() {
   DCHECK(parent_web_view_scheduler_);
   if (!unthrottled_web_task_runner_) {
@@ -246,10 +224,6 @@
     state->SetString("unthrottled_task_queue",
                      PointerToId(unthrottled_task_queue_.get()));
   }
-  if (suspendable_task_queue_) {
-    state->SetString("suspendable_task_queue",
-                     PointerToId(suspendable_task_queue_.get()));
-  }
   if (blame_context_) {
     state->BeginDictionary("blame_context");
     state->SetString(
@@ -278,8 +252,6 @@
     loading_queue_enabled_voter_->SetQueueEnabled(!frame_suspended);
   if (timer_queue_enabled_voter_)
     timer_queue_enabled_voter_->SetQueueEnabled(!frame_suspended);
-  if (suspendable_queue_enabled_voter_)
-    suspendable_queue_enabled_voter_->SetQueueEnabled(!frame_suspended);
 }
 
 void WebFrameSchedulerImpl::onFirstMeaningfulPaint() {