[scheduler] CPUTimeBudgetPool: Require a minimal level of budget to run

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"
@@ skipping 294 matching lines @@
 
   base::TimeDelta delay = pending_pump_throttled_tasks_runtime_.value() - now;
   TRACE_EVENT1(tracing_category_,
                "TaskQueueThrottler::MaybeSchedulePumpThrottledTasks",
                "delay_till_next_pump_ms", delay.InMilliseconds());
   task_runner_->PostDelayedTask(
       from_here, pump_throttled_tasks_closure_.callback(), delay);
 }
 
 CPUTimeBudgetPool* TaskQueueThrottler::CreateCPUTimeBudgetPool(
-    const char* name,
-    base::Optional<base::TimeDelta> max_budget_level,
-    base::Optional<base::TimeDelta> max_throttling_duration) {
+    const char* name) {
   CPUTimeBudgetPool* time_budget_pool =
-      new CPUTimeBudgetPool(name, this, tick_clock_->NowTicks(),
-                            max_budget_level, max_throttling_duration);
+      new CPUTimeBudgetPool(name, this, tick_clock_->NowTicks());
   budget_pools_[time_budget_pool] = base::WrapUnique(time_budget_pool);
   return time_budget_pool;
 }
 
 void TaskQueueThrottler::OnTaskRunTimeReported(TaskQueue* task_queue,
                                                base::TimeTicks start_time,
                                                base::TimeTicks end_time) {
   if (!IsThrottled(task_queue))
     return;
 
@@ skipping 160 matching lines @@
     queue->InsertFence(TaskQueue::InsertFencePosition::BEGINNING_OF_TIME);
     queue->SetTimeDomain(time_domain_.get());
     SchedulePumpQueue(FROM_HERE, lazy_now.Now(), queue);
   }
 
   TRACE_EVENT0(tracing_category_, "TaskQueueThrottler_EnableThrottling");
 }
 
 }  // namespace scheduler
 }  // namespace blink