[scheduler] Move task alignment into WakeUpBudgetPool.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/scheduler/renderer/task_queue_throttler.h"
 
 #include <stddef.h>
 
 #include <memory>
 
@@ skipping 139 matching lines @@
 
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(0), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(5), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(9), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(10), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(11), false));
 
   // GetNextAllowedRunTime should return the desired time when in the
   // wakeup window and return the next wakeup otherwise.
   EXPECT_EQ(start_time_, pool->GetNextAllowedRunTime(start_time_));
-  EXPECT_EQ(SecondsAfterStart(10) - base::TimeDelta::FromMicroseconds(1),
+  EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromSeconds(10),
             pool->GetNextAllowedRunTime(MillisecondsAfterStart(15)));
 
   pool->RecordTaskRunTime(queue.get(), MillisecondsAfterStart(5),
                           MillisecondsAfterStart(7));
 
   // Make sure that nothing changes after a task inside wakeup window.
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(0), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(5), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(9), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(10), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(11), false));
   EXPECT_EQ(start_time_, pool->GetNextAllowedRunTime(start_time_));
-  EXPECT_EQ(SecondsAfterStart(10) - base::TimeDelta::FromMicroseconds(1),
+  EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromSeconds(10),
             pool->GetNextAllowedRunTime(MillisecondsAfterStart(15)));
 
   pool->OnWakeUp(MillisecondsAfterStart(12005));
   pool->RecordTaskRunTime(queue.get(), MillisecondsAfterStart(12005),
                           MillisecondsAfterStart(12007));
 
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(12005), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(12007), false));
   EXPECT_TRUE(pool->CanRunTasksAt(MillisecondsAfterStart(12014), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(12015), false));
   EXPECT_FALSE(pool->CanRunTasksAt(MillisecondsAfterStart(12016), false));
-  EXPECT_EQ(
-      MillisecondsAfterStart(22005) - base::TimeDelta::FromMicroseconds(1),
-      pool->GetNextAllowedRunTime(SecondsAfterStart(13)));
+  EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromSeconds(20),
+            pool->GetNextAllowedRunTime(SecondsAfterStart(13)));
 }
 
 }  // namespace scheduler
 }  // namespace blink