Remove the code that prevents task blocking if not expecting frames

components/scheduler/renderer/renderer_scheduler_impl.cc

 // Copyright 2014 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 "components/scheduler/renderer/renderer_scheduler_impl.h"
 
 #include "base/bind.h"
 #include "base/debug/stack_trace.h"
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 614 matching lines @@
   }
   MainThreadOnly().touchstart_expected_soon = touchstart_expected_soon;
 
   base::TimeDelta longest_jank_free_task_duration =
       EstimateLongestJankFreeTaskDuration();
   MainThreadOnly().longest_jank_free_task_duration =
       longest_jank_free_task_duration;
 
   bool loading_tasks_seem_expensive = false;
   bool timer_tasks_seem_expensive = false;
-  // Only deem tasks to be exensive (which may cause them to be preemptively
-  // blocked) if we are expecting frames.
-  if (!MainThreadOnly().begin_frame_not_expected_soon) {
-    loading_tasks_seem_expensive =
-        MainThreadOnly().loading_task_cost_estimator.expected_task_duration() >
-        longest_jank_free_task_duration;
-    timer_tasks_seem_expensive =
-        MainThreadOnly().timer_task_cost_estimator.expected_task_duration() >
-        longest_jank_free_task_duration;
-  }
+  loading_tasks_seem_expensive =
+      MainThreadOnly().loading_task_cost_estimator.expected_task_duration() >
+      longest_jank_free_task_duration;
+  timer_tasks_seem_expensive =
+      MainThreadOnly().timer_task_cost_estimator.expected_task_duration() >
+      longest_jank_free_task_duration;
   MainThreadOnly().timer_tasks_seem_expensive = timer_tasks_seem_expensive;
   MainThreadOnly().loading_tasks_seem_expensive = loading_tasks_seem_expensive;
 
   // The |new_policy_duration| is the minimum of |expected_use_case_duration|
   // and |touchstart_expected_flag_valid_for_duration| unless one is zero in
   // which case we choose the other.
   base::TimeDelta new_policy_duration = expected_use_case_duration;
   if (new_policy_duration == base::TimeDelta() ||
       (touchstart_expected_flag_valid_for_duration > base::TimeDelta() &&
        new_policy_duration > touchstart_expected_flag_valid_for_duration)) {
@@ skipping 540 matching lines @@
     }
     MainThreadOnly().have_reported_blocking_intervention_since_navigation =
         true;
     BroadcastConsoleWarning(
         "Deferred long-running timer task(s) to improve scrolling smoothness. "
         "See crbug.com/574343.");
   }
 }
 
 }  // namespace scheduler