Change default timestamp to 64 bits in all webrtc directories.

webrtc/base/physicalsocketserver.cc

Index: webrtc/base/physicalsocketserver.cc
diff --git a/webrtc/base/physicalsocketserver.cc b/webrtc/base/physicalsocketserver.cc
index 708499df531f076af2210137c0eb2ed4795c6bab..bbf9aedb74905d83edf74e884266647b11929771 100644
--- a/webrtc/base/physicalsocketserver.cc
+++ b/webrtc/base/physicalsocketserver.cc
@@ -1463,7 +1463,7 @@ bool PhysicalSocketServer::InstallSignal(int signum, void (*handler)(int)) {
 bool PhysicalSocketServer::Wait(int cmsWait, bool process_io) {
   int cmsTotal = cmsWait;
   int cmsElapsed = 0;
-  uint32_t msStart = Time();
+  int64_t msStart = Time();
 
   fWait_ = true;
   while (fWait_) {
@@ -1613,7 +1613,7 @@ bool PhysicalSocketServer::Wait(int cmsWait, bool process_io) {
     // Break?
     if (!fWait_)
       break;
-    cmsElapsed = TimeSince(msStart);
+    cmsElapsed = static_cast<int>(TimeSince(msStart));

[pthatcher1, 2016/05/02 16:57:56]

Can you leave a comment about why we do this and why we think it's safe?

[honghaiz3, 2016/05/03 21:18:25]

Just used int64_t instead. 
Deferred the type conversion to the call WSAWaitForMultipleEvents

     if ((cmsWait != kForever) && (cmsElapsed >= cmsWait)) {
        break;
     }