Provision to start base::SimpleTestTickClock at initial ticks

media/renderers/video_renderer_impl_unittest.cc

 // Copyright 2013 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 <stdint.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 36 matching lines @@
 
 MATCHER_P(HasTimestamp, ms, "") {
   *result_listener << "has timestamp " << arg->timestamp().InMilliseconds();
   return arg->timestamp().InMilliseconds() == ms;
 }
 
 class VideoRendererImplTest
     : public testing::Test {
  public:
   VideoRendererImplTest()
-      : tick_clock_(new base::SimpleTestTickClock()),
+      :  // Start wallclock time at a non-zero value.
+        tick_clock_(new base::SimpleTestTickClock(
+            base::TimeTicks() + base::TimeDelta::FromMilliseconds(12345))),
         decoder_(new MockVideoDecoder()),
         demuxer_stream_(DemuxerStream::VIDEO) {
     ScopedVector<VideoDecoder> decoders;
     decoders.push_back(decoder_);
 
     null_video_sink_.reset(new NullVideoSink(
         false, base::TimeDelta::FromSecondsD(1.0 / 60),
         base::Bind(&MockCB::FrameReceived, base::Unretained(&mock_cb_)),
         message_loop_.task_runner()));
 
     renderer_.reset(new VideoRendererImpl(
         message_loop_.task_runner(), message_loop_.task_runner().get(),
         null_video_sink_.get(), std::move(decoders), true,
         nullptr,  // gpu_factories
         new MediaLog()));
     renderer_->SetTickClockForTesting(scoped_ptr<base::TickClock>(tick_clock_));
     null_video_sink_->set_tick_clock_for_testing(tick_clock_);
     time_source_.set_tick_clock_for_testing(tick_clock_);
 
-    // Start wallclock time at a non-zero value.
-    AdvanceWallclockTimeInMs(12345);
-
     demuxer_stream_.set_video_decoder_config(TestVideoConfig::Normal());
 
     // We expect these to be called but we don't care how/when.
     EXPECT_CALL(demuxer_stream_, Read(_)).WillRepeatedly(
         RunCallback<0>(DemuxerStream::kOk,
                        scoped_refptr<DecoderBuffer>(new DecoderBuffer(0))));
   }
 
   virtual ~VideoRendererImplTest() {}
 
@@ skipping 687 matching lines @@
   QueueFrames("0 10 20 30");
   StartPlayingFrom(0);
   Flush();
   ASSERT_EQ(1u, frame_ready_cbs_.size());
   // This frame will be discarded.
   frame_ready_cbs_.front().Run();
   Destroy();
 }
 
 }  // namespace media