Change default timestamp to 64 bits in all webrtc directories.

webrtc/voice_engine/test/auto_test/voe_conference_test.cc

Index: webrtc/voice_engine/test/auto_test/voe_conference_test.cc
diff --git a/webrtc/voice_engine/test/auto_test/voe_conference_test.cc b/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
index c70d92a94627f467569701ec5a91d467c06d88ad..c8fe4a61ce6ba99df7266f084a620ce4c744f104 100644
--- a/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
+++ b/webrtc/voice_engine/test/auto_test/voe_conference_test.cc
@@ -79,8 +79,7 @@ TEST(VoeConferenceTest, RttAndStartNtpTime) {
   webrtc::CallStatistics stats_2;
   std::queue<Stats> stats_buffer;
 
-  while (rtc::TimeIsLater(rtc::Time(), deadline) &&
-      successive_pass < kNeedSuccessivePass) {
+  while (rtc::Time() < deadline && successive_pass < kNeedSuccessivePass) {
     webrtc::SleepMs(kStatsRequestIntervalMs);
 
     EXPECT_TRUE(trans.GetReceiverStatistics(id_1, &stats_1));