Provision to start base::SimpleTestTickClock at initial ticks

media/cast/net/rtcp/receiver_rtcp_event_subscriber_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/rtcp/receiver_rtcp_event_subscriber.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 12 matching lines @@
 namespace {
 
 const size_t kMaxEventEntries = 10u;
 const int64_t kDelayMs = 20L;
 
 }  // namespace
 
 class ReceiverRtcpEventSubscriberTest : public ::testing::Test {
  protected:
   ReceiverRtcpEventSubscriberTest()
-      : testing_clock_(new base::SimpleTestTickClock()),
+      : testing_clock_(new base::SimpleTestTickClock(base::TimeTicks())),
         task_runner_(new test::FakeSingleThreadTaskRunner(testing_clock_)),
         cast_environment_(
             new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_),
                                 task_runner_,
                                 task_runner_,
                                 task_runner_)) {}
 
   ~ReceiverRtcpEventSubscriberTest() override {}
 
   void TearDown() final {
@@ skipping 123 matching lines @@
     cast_environment_->logger()->DispatchFrameEvent(std::move(decode_event));
   }
 
   ReceiverRtcpEventSubscriber::RtcpEvents rtcp_events;
   event_subscriber_->GetRtcpEventsWithRedundancy(&rtcp_events);
   EXPECT_EQ(10u, rtcp_events.size());
 }
 
 }  // namespace cast
 }  // namespace media