[scheduling] Don't pass a queue to record task time on budget pools for find...

[scheduling] Don't pass a queue to record task time on budget pools for find in page and compositor experiments.

The cpu time budget pool doesn't use the queue that it is passed when it
records task run time, so we will pass nullptr in those spots instead.
This will allow us to avoid passing a raw pointer to a TaskQueue in a spot
we don't need it as a pre-requisite to this CL: crrev.com/c/2453591.

Change-Id: Ifc7de7e94e667c1de1d4bc4de30203becc03fafc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485346Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Katie Dillon <kdillon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819141}

third_party/blink/renderer/platform/scheduler/main_thread/compositor_priority_experiments.cc

@@ -213,8 +213,8 @@ void CompositorPriorityExperiments::CompositorBudgetPoolController::
                     MainThreadTaskQueue::TaskTiming* task_timing,
                     bool have_seen_stop_signal) {
   if (have_seen_stop_signal) {
-    compositor_budget_pool_->RecordTaskRunTime(queue, task_timing->start_time(),
-                                               task_timing->end_time());
+    compositor_budget_pool_->RecordTaskRunTime(
+        nullptr, task_timing->start_time(), task_timing->end_time());
   }
   UpdateCompositorBudgetState(task_timing->end_time());
 }

third_party/blink/renderer/platform/scheduler/main_thread/find_in_page_budget_pool_controller.cc

@@ -59,7 +59,7 @@ void FindInPageBudgetPoolController::OnTaskCompleted(
   if (queue->GetPrioritisationType() ==
       MainThreadTaskQueue::QueueTraits::PrioritisationType::kFindInPage) {
     find_in_page_budget_pool_->RecordTaskRunTime(
-        queue, task_timing->start_time(), task_timing->end_time());
+        nullptr, task_timing->start_time(), task_timing->end_time());
   }
 
   bool is_exhausted = !find_in_page_budget_pool_->CanRunTasksAt(