Provision to start base::SimpleTestTickClock at initial ticks

media/cast/net/cast_transport_sender_impl_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 "media/cast/net/cast_transport_sender_impl.h"
 
 #include <gtest/gtest.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 50 matching lines @@
   base::Closure callback_;
   PacketRef stored_packet_;
   int packets_sent_;
   int64_t bytes_sent_;
 
   DISALLOW_COPY_AND_ASSIGN(FakePacketSender);
 };
 
 class CastTransportSenderImplTest : public ::testing::Test {
  protected:
-  CastTransportSenderImplTest() : num_times_logging_callback_called_(0) {
-    testing_clock_.Advance(
-        base::TimeDelta::FromMilliseconds(kStartMillisecond));
+  CastTransportSenderImplTest()
+      : testing_clock_(base::TimeTicks() +
+                       base::TimeDelta::FromMilliseconds(kStartMillisecond)),
+        num_times_logging_callback_called_(0) {
     task_runner_ = new test::FakeSingleThreadTaskRunner(&testing_clock_);
   }
 
   ~CastTransportSenderImplTest() override {}
 
   void InitWithoutLogging() {
     transport_sender_.reset(
         new CastTransportSenderImpl(NULL,
                                     &testing_clock_,
                                     net::IPEndPoint(),
@@ skipping 298 matching lines @@
   task_runner_->RunTasks();
   EXPECT_EQ(7, transport_.packets_sent());
   EXPECT_EQ(1, num_times_logging_callback_called_);  // Only 8 ms since last.
 
   task_runner_->Sleep(base::TimeDelta::FromMilliseconds(2));
   EXPECT_EQ(2, num_times_logging_callback_called_);
 }
 
 }  // namespace cast
 }  // namespace media