Provision to start base::SimpleTestTickClock at initial ticks

media/cast/net/rtp/cast_message_builder_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/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 67 matching lines @@
   MissingPacketsMap missing_packets_;  // Missing packets per frame.
   uint32_t last_frame_acked_;
 
   DISALLOW_COPY_AND_ASSIGN(NackFeedbackVerification);
 };
 }  // namespace
 
 class CastMessageBuilderTest : public ::testing::Test {
  protected:
   CastMessageBuilderTest()
-      : framer_(&testing_clock_,
-                &feedback_,
-                kSsrc,
-                true,
-                10),
+      : framer_(&testing_clock_, &feedback_, kSsrc, true, 10),
         cast_msg_builder_(new CastMessageBuilder(&testing_clock_,
                                                  &feedback_,
                                                  &framer_,
                                                  kSsrc,
                                                  true,
-                                                 0)) {
+                                                 0)),
+        testing_clock_(base::TimeTicks() +
+                       base::TimeDelta::FromMilliseconds(kStartMillisecond)) {
     rtp_header_.sender_ssrc = kSsrc;
     rtp_header_.is_key_frame = false;
-    testing_clock_.Advance(
-        base::TimeDelta::FromMilliseconds(kStartMillisecond));
   }
 
   ~CastMessageBuilderTest() override {}
 
   void SetFrameIds(uint32_t frame_id, uint32_t reference_frame_id) {
     rtp_header_.frame_id = frame_id;
     rtp_header_.reference_frame_id = reference_frame_id;
   }
 
   void SetPacketId(uint16_t packet_id) { rtp_header_.packet_id = packet_id; }
@@ skipping 317 matching lines @@
   SetFrameIds(frame_id, frame_id - 1);
   InsertPacket();
   testing_clock_.Advance(
       base::TimeDelta::FromMilliseconds(kShortTimeIncrementMs));
   EXPECT_TRUE(feedback_.triggered());
   EXPECT_EQ(frame_id, feedback_.last_frame_acked());
 }
 
 }  // namespace cast
 }  // namespace media