Provision to start base::SimpleTestTickClock at initial ticks

media/cast/net/rtcp/rtcp_utility_unittest.cc

Index: media/cast/net/rtcp/rtcp_utility_unittest.cc
diff --git a/media/cast/net/rtcp/rtcp_utility_unittest.cc b/media/cast/net/rtcp/rtcp_utility_unittest.cc
index ec3875553bf5d547dc6052b590f92711ffb51670..66f291ce70935c3d8d5d3c4975fe4ec86e9f50fb 100644
--- a/media/cast/net/rtcp/rtcp_utility_unittest.cc
+++ b/media/cast/net/rtcp/rtcp_utility_unittest.cc
@@ -108,8 +108,11 @@ class RtcpParserTest : public ::testing::Test {
       for (; event_incoming_it != incoming_it->event_log_messages_.end();
            ++event_incoming_it, ++event_expected_it) {
         EXPECT_EQ(event_expected_it->type, event_incoming_it->type);
+        // SimpleTestTickClock starts at 1 microsecond, add to incoming
+        // timestamp
         EXPECT_EQ(event_expected_it->event_timestamp,
-                  event_incoming_it->event_timestamp);
+                  event_incoming_it->event_timestamp +
+                      base::TimeDelta::FromMicroseconds(1));
         if (event_expected_it->type == PACKET_RECEIVED) {
           EXPECT_EQ(event_expected_it->packet_id, event_incoming_it->packet_id);
         } else {