[scheduler] Do not call PumpThrottledTasks immediately when descheduled

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

Index: third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.cc b/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.cc
index c64fbd46ae460e29911ae8fa3a701b1cdbedbb6b..8d4288620c54fe7c72e770984eaac026a5621933 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.cc
@@ -485,7 +485,8 @@ void TaskQueueThrottler::MaybeSchedulePumpThrottledTasks(
     return;
 
   base::TimeTicks runtime =
-      std::max(now, AlignedThrottledRunTime(unaligned_runtime));
+      AlignedThrottledRunTime(std::max(now, unaligned_runtime));
+  DCHECK_LE(now, runtime);
 
   // If there is a pending call to PumpThrottledTasks and it's sooner than
   // |runtime| then return.