[cc] Calculate the correct latest_confirmed_sequence_number in cc::Scheduler.

cc/surfaces/display_scheduler_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 "cc/surfaces/display_scheduler.h"
 
 #include "base/logging.h"
 #include "base/test/null_task_runner.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 79 matching lines @@
     now_src_.Advance(base::TimeDelta::FromMicroseconds(10000));
     scheduler_.SetClient(&client_);
   }
 
   ~DisplaySchedulerTest() override {}
 
   void SetUp() override { scheduler_.SetRootSurfaceResourcesLocked(false); }
 
   void AdvanceTimeAndBeginFrameForTest() {
     now_src_.Advance(base::TimeDelta::FromMicroseconds(10000));
-    base::TimeTicks frame_time = now_src_.NowTicks();
-    base::TimeDelta interval = BeginFrameArgs::DefaultInterval();
-    base::TimeTicks deadline = frame_time + interval;
     // FakeBeginFrameSource deals with |source_id| and |sequence_number|.
-    fake_begin_frame_source_.TestOnBeginFrame(
-        BeginFrameArgs::Create(BEGINFRAME_FROM_HERE, 0, 1, frame_time, deadline,
-                               interval, BeginFrameArgs::NORMAL));
+    BeginFrameArgs args = fake_begin_frame_source_.CreateBeginFrameArgs(
+        BEGINFRAME_FROM_HERE, &now_src_);
+    fake_begin_frame_source_.TestOnBeginFrame(args);
   }
 
  protected:
   base::SimpleTestTickClock& now_src() { return now_src_; }
   FakeDisplaySchedulerClient& client() { return client_; }
   DisplayScheduler& scheduler() { return scheduler_; }
 
   FakeExternalBeginFrameSource fake_begin_frame_source_;
 
   base::SimpleTestTickClock now_src_;
@@ skipping 476 matching lines @@
 
   scheduler_.SetRootSurfaceResourcesLocked(true);
   EXPECT_EQ(++count, scheduler_.scheduler_begin_frame_deadline_count());
 
   scheduler_.OutputSurfaceLost();
   EXPECT_EQ(++count, scheduler_.scheduler_begin_frame_deadline_count());
 }
 
 }  // namespace
 }  // namespace cc