[scheduler] Change TaskQueue observer call mechanism.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/scheduler/renderer/task_queue_throttler.h"
 
 #include <cstdint>
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/strings/stringprintf.h"
 #include "platform/WebFrameScheduler.h"
 #include "platform/scheduler/base/real_time_domain.h"
 #include "platform/scheduler/child/scheduler_tqm_delegate.h"
 #include "platform/scheduler/renderer/budget_pool.h"
 #include "platform/scheduler/renderer/renderer_scheduler_impl.h"
 #include "platform/scheduler/renderer/throttled_time_domain.h"
 #include "platform/scheduler/renderer/web_frame_scheduler_impl.h"
 
 namespace blink {
 namespace scheduler {
 
 namespace {
 
 base::Optional<base::TimeTicks> NextTaskRunTime(LazyNow* lazy_now,
                                                 TaskQueue* queue) {
-  if (queue->HasPendingImmediateWork())
+  if (queue->HasTaskToRunImmediately())
     return lazy_now->Now();
   return queue->GetNextScheduledWakeUp();
 }
 
 template <class T>
 T Min(const base::Optional<T>& optional, const T& value) {
   if (!optional) {
     return value;
   }
   return std::min(optional.value(), value);
@@ skipping 519 matching lines @@
     queue->InsertFence(TaskQueue::InsertFencePosition::BEGINNING_OF_TIME);
     queue->SetTimeDomain(time_domain_.get());
     UpdateQueueThrottlingState(lazy_now.Now(), queue);
   }
 
   TRACE_EVENT0("renderer.scheduler", "TaskQueueThrottler_EnableThrottling");
 }
 
 }  // namespace scheduler
 }  // namespace blink