[scheduler] Move task alignment into WakeUpBudgetPool.

third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp

Index: third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp b/third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp
index cdb41a92783e04ebbe2d414263d6fa3cd481e907..f3aede4f9308b64b2d890aad7b77ded880326b42 100644
--- a/third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp
+++ b/third_party/WebKit/Source/web/tests/scheduler/ThrottlingTest.cpp
@@ -66,4 +66,35 @@ TEST_F(DisableBackgroundThrottlingIsRespectedTest,
                                              "called f", "called f"));
 }
 
+class BackgroundRendererThrottlingTest : public SimTest {};
+
+TEST_F(BackgroundRendererThrottlingTest, BackgroundRenderersAreThrottled) {
+  SimRequest main_resource("https://example.com/", "text/html");
+
+  LoadURL("https://example.com/");
+
+  main_resource.Complete(
+      "(<script>"
+      "  function f(repetitions) {"
+      "     if (repetitions == 0) return;"
+      "     console.log('called f');"
+      "     setTimeout(f, 10, repetitions - 1);"
+      "  }"
+      "  setTimeout(f, 10, 3);"
+      "</script>)");
+
+  Platform::Current()
+      ->CurrentThread()
+      ->Scheduler()
+      ->GetRendererSchedulerForTest()
+      ->OnRendererBackgrounded();
+
+  // Make sure that we run a task once a second.
+  for (int i = 0; i < 3; ++i) {
+    testing::RunDelayedTasks(1000);
+    EXPECT_THAT(ConsoleMessages(), ElementsAre("called f"));
+    ConsoleMessages().clear();
+  }
+}
+
 }  // namespace blink