Change default timestamp to 64 bits in all webrtc directories.

webrtc/base/virtualsocketserver.cc

Index: webrtc/base/virtualsocketserver.cc
diff --git a/webrtc/base/virtualsocketserver.cc b/webrtc/base/virtualsocketserver.cc
index c6d402f1f3f27877b3e13a0afba8aa6c613da9ce..2d6ee0fa36326c0d41d4a5abab28c770028af6cc 100644
--- a/webrtc/base/virtualsocketserver.cc
+++ b/webrtc/base/virtualsocketserver.cc
@@ -894,15 +894,15 @@ void VirtualSocketServer::AddPacketToNetwork(VirtualSocket* sender,
   // Post the packet as a message to be delivered (on our own thread)
   Packet* p = new Packet(data, data_size, sender_addr);
 
-  uint32_t ts = TimeAfter(send_delay + transit_delay);
+  int64_t ts = TimeAfter(send_delay + transit_delay);
   if (ordered) {
     // Ensure that new packets arrive after previous ones
     // TODO: consider ordering on a per-socket basis, since this
-    // introduces artifical delay.
-    ts = TimeMax(ts, network_delay_);
+    // introduces artificial delay.
+    ts = std::max(ts, network_delay_);
   }
   msg_queue_->PostAt(ts, recipient, MSG_ID_PACKET, p);
-  network_delay_ = TimeMax(ts, network_delay_);
+  network_delay_ = std::max(ts, network_delay_);
 }
 
 void VirtualSocketServer::PurgeNetworkPackets(VirtualSocket* socket,