Provision to start base::SimpleTestTickClock at initial ticks

media/cast/net/pacing/paced_sender_unittest.cc

 // Copyright 2014 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 <stddef.h>
 #include <stdint.h>
 
 #include "base/big_endian.h"
 #include "base/macros.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 41 matching lines @@
 
  public:
   std::list<int> expected_packet_size_;
   int64_t bytes_sent_;
 
   DISALLOW_COPY_AND_ASSIGN(TestPacketSender);
 };
 
 class PacedSenderTest : public ::testing::Test {
  protected:
-  PacedSenderTest() : frame_id_(0) {
-    testing_clock_.Advance(
-        base::TimeDelta::FromMilliseconds(kStartMillisecond));
+  PacedSenderTest()
+      : testing_clock_(base::TimeTicks() +
+                       base::TimeDelta::FromMilliseconds(kStartMillisecond)),
+        frame_id_(0) {
     task_runner_ = new test::FakeSingleThreadTaskRunner(&testing_clock_);
     paced_sender_.reset(new PacedSender(kTargetBurstSize, kMaxBurstSize,
                                         &testing_clock_, &packet_events_,
                                         &mock_transport_, task_runner_));
     paced_sender_->RegisterAudioSsrc(kAudioSsrc);
     paced_sender_->RegisterVideoSsrc(kVideoSsrc);
   }
 
   static void UpdateCastTransportStatus(CastTransportStatus status) {
     NOTREACHED();
@@ skipping 379 matching lines @@
   EXPECT_TRUE(paced_sender_->ResendPackets(packets, dedup_info));
   EXPECT_EQ(static_cast<int64_t>(kSize1), mock_transport_.GetBytesSent());
 
   dedup_info.resend_interval = base::TimeDelta::FromMilliseconds(5);
   EXPECT_TRUE(paced_sender_->ResendPackets(packets, dedup_info));
   EXPECT_EQ(static_cast<int64_t>(2 * kSize1), mock_transport_.GetBytesSent());
 }
 
 }  // namespace cast
 }  // namespace media