[blink scheduler] Allow unaligned wake ups in same-origin frames.

This CL uses the unaligned wake ups setting added to WakeUpBudgetPool
in https://crrev.com/c/2249377 to allow unaligned wake ups in
frames that are same-origin with the main frame.

This completes implementation of the policy presented in this
message: https://groups.google.com/a/chromium.org/g/blink-dev/c/8En_5DqV_fU/m/z0Xth2xLAgAJ

Bug: 1075553
Change-Id: I1ac00f1efc58f1a701120514fb7ca4dcca94ba9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2252935
Commit-Queue: François Doray <fdoray@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782051}

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

@@ -18,6 +18,7 @@
 #include "third_party/blink/renderer/platform/runtime_enabled_features.h"
 #include "third_party/blink/renderer/platform/scheduler/common/features.h"
 #include "third_party/blink/renderer/platform/scheduler/common/throttling/budget_pool.h"
+#include "third_party/blink/renderer/platform/scheduler/common/throttling/task_queue_throttler.h"
 #include "third_party/blink/renderer/platform/scheduler/main_thread/auto_advancing_virtual_time_domain.h"
 #include "third_party/blink/renderer/platform/scheduler/main_thread/frame_scheduler_impl.h"
 #include "third_party/blink/renderer/platform/scheduler/main_thread/main_thread_scheduler_impl.h"
@@ -637,9 +638,14 @@ void PageSchedulerImpl::MaybeInitializeWakeUpBudgetPools(
       main_thread_scheduler_->task_queue_throttler()->CreateWakeUpBudgetPool(
           "Page Wake Up Throttling - Cross-Origin to Main Frame");
 
-  // The Wake Up Interval is set in UpdateWakeUpBudgetPools(), based on current
-  // state. The Wake Up Duration is constant and is set here.
+  // The Wake Up Duration and Unaligned Wake Ups Allowance are constant and set
+  // here. The Wake Up Interval is set in UpdateWakeUpBudgetPools(), based on
+  // current state.
   same_origin_wake_up_budget_pool_->SetWakeUpDuration(kThrottledWakeUpDuration);
+  if (IsIntensiveWakeUpThrottlingEnabled()) {
+    same_origin_wake_up_budget_pool_->AllowUnalignedWakeUpIfNoRecentWakeUp();
+  }
+
   cross_origin_wake_up_budget_pool_->SetWakeUpDuration(
       kThrottledWakeUpDuration);
 

third_party/blink/renderer/platform/scheduler/main_thread/page_scheduler_impl.h

@@ -286,9 +286,6 @@ class PLATFORM_EXPORT PageSchedulerImpl : public PageScheduler {
   //
   // This pool allows aligned wake ups and unaligned wake ups if there hasn't
   // been a recent wake up.
-  //
-  // TODO(https://crbug.com/1075553): Implement unaligned wake ups if there
-  // hasn't been a recent wake up.
   WakeUpBudgetPool* same_origin_wake_up_budget_pool_;
   // Throttles wake ups in throttleable TaskQueues of frames that are
   // cross-origin with the main frame.