[scheduler] Change TaskQueue observer call mechanism.

third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc

Index: third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc b/third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc
index 0ce84fae25ed66dcbba5b419fcc111498026b648..b61f37383b48db7293abd4c6b6c830e115be5980 100644
--- a/third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc
+++ b/third_party/WebKit/Source/platform/scheduler/child/idle_helper.cc
@@ -96,7 +96,7 @@ IdleHelper::IdlePeriodState IdleHelper::ComputeNewLongIdlePeriodState(
   if (long_idle_period_duration >=
       base::TimeDelta::FromMilliseconds(kMinimumIdlePeriodDurationMillis)) {
     *next_long_idle_period_delay_out = long_idle_period_duration;
-    if (!idle_queue_->HasPendingImmediateWork()) {
+    if (!idle_queue_->HasTaskToRunImmediately()) {
       return IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED;
     } else if (long_idle_period_duration == max_long_idle_period_duration) {
       return IdlePeriodState::IN_LONG_IDLE_PERIOD_WITH_MAX_DEADLINE;
@@ -248,7 +248,7 @@ void IdleHelper::UpdateLongIdlePeriodStateAfterIdleTask() {
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("renderer.scheduler"),
                "UpdateLongIdlePeriodStateAfterIdleTask");
 
-  if (!idle_queue_->HasPendingImmediateWork()) {
+  if (!idle_queue_->HasTaskToRunImmediately()) {
     // If there are no more idle tasks then pause long idle period ticks until a
     // new idle task is posted.
     state_.UpdateState(IdlePeriodState::IN_LONG_IDLE_PERIOD_PAUSED,