Provision to start base::SimpleTestTickClock at initial ticks

media/cast/logging/stats_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/logging/stats_event_subscriber.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 12 matching lines @@
 namespace {
 const int kReceiverOffsetSecs = 100;
 }
 
 namespace media {
 namespace cast {
 
 class StatsEventSubscriberTest : public ::testing::Test {
  protected:
   StatsEventSubscriberTest()
-      : sender_clock_(new base::SimpleTestTickClock()),
+      : sender_clock_(new base::SimpleTestTickClock(base::TimeTicks())),
+        receiver_clock_(base::TimeTicks() +
+                        base::TimeDelta::FromSeconds(kReceiverOffsetSecs)),
         task_runner_(new test::FakeSingleThreadTaskRunner(sender_clock_)),
         cast_environment_(
             new CastEnvironment(scoped_ptr<base::TickClock>(sender_clock_),
                                 task_runner_,
                                 task_runner_,
                                 task_runner_)),
         fake_offset_estimator_(
             base::TimeDelta::FromSeconds(kReceiverOffsetSecs)) {
-    receiver_clock_.Advance(base::TimeDelta::FromSeconds(kReceiverOffsetSecs));
     cast_environment_->logger()->Subscribe(&fake_offset_estimator_);
   }
 
   ~StatsEventSubscriberTest() override {
     if (subscriber_.get())
       cast_environment_->logger()->Unsubscribe(subscriber_.get());
     cast_environment_->logger()->Unsubscribe(&fake_offset_estimator_);
   }
 
   void AdvanceClocks(base::TimeDelta delta) {
@@ skipping 637 matching lines @@
 
   histogram = subscriber_->GetHistogramForTesting(
       StatsEventSubscriber::LATE_FRAME_MS_HISTO);
   ASSERT_TRUE(histogram);
   values = histogram->GetHistogram();
   EXPECT_TRUE(CheckHistogramHasValue(values.get(), "100-119", 1));
 }
 
 }  // namespace cast
 }  // namespace media