Don't use rtc::PacketTime explicitly, use implicit int64_t conversion

This is a step towards deleting the rtc::PacketTime class.

Bug: webrtc:9584
Change-Id: Iaae4dd05d398fc6ea67d63981277fb84859b5c21
Reviewed-on: https://chromium-review.googlesource.com/c/1313931Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Niels Möller <nisse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605285}

content/renderer/p2p/ipc_socket_factory.cc

@@ -648,9 +648,8 @@ void IpcPacketSocket::OnDataReceived(const net::IPEndPoint& address,
     }
   }
 
-  rtc::PacketTime packet_time(timestamp.ToInternalValue(), 0);
   SignalReadPacket(this, reinterpret_cast<const char*>(&data[0]), data.size(),
-                   address_lj, packet_time);
+                   address_lj, timestamp.since_origin().InMicroseconds());
 }
 
 AsyncAddressResolverImpl::AsyncAddressResolverImpl(

remoting/client/plugin/pepper_packet_socket_factory.cc

@@ -393,7 +393,7 @@ void UdpPacketSocket::HandleReadResult(int result, pp::NetAddress address) {
     rtc::SocketAddress socket_address;
     PpNetAddressToSocketAddress(address, &socket_address);
     SignalReadPacket(this, &receive_buffer_[0], result, socket_address,
-                     rtc::CreatePacketTime(0));
+                     rtc::TimeMicros());
   } else if (result != PP_ERROR_ABORTED) {
     LOG(ERROR) << "Received error when reading from UDP socket: " << result;
   }

remoting/protocol/channel_socket_adapter_unittest.cc

@@ -65,7 +65,7 @@ TEST_F(TransportChannelSocketAdapterTest, Read) {
   ASSERT_EQ(net::ERR_IO_PENDING, result);
 
   channel_.SignalReadPacket(&channel_, kTestData, kTestDataSize,
-                            rtc::CreatePacketTime(0), 0);
+                            rtc::TimeMicros(), 0);
   EXPECT_EQ(kTestDataSize, callback_result_);
 }
 

remoting/protocol/chromium_socket_factory.cc

@@ -369,7 +369,7 @@ void UdpPacketSocket::HandleReadResult(int result) {
       return;
     }
     SignalReadPacket(this, receive_buffer_->data(), result, address,
-                     rtc::CreatePacketTime(0));
+                     rtc::TimeMicros());
   } else {
     LOG(ERROR) << "Received error when reading from UDP socket: " << result;
   }

remoting/test/fake_socket_factory.cc

@@ -96,8 +96,7 @@ void FakeUdpSocket::ReceivePacket(const rtc::SocketAddress& from,
                                   const rtc::SocketAddress& to,
                                   const scoped_refptr<net::IOBuffer>& data,
                                   int data_size) {
-  SignalReadPacket(
-      this, data->data(), data_size, from, rtc::CreatePacketTime(0));
+  SignalReadPacket(this, data->data(), data_size, from, rtc::TimeMicros());
 }
 
 rtc::SocketAddress FakeUdpSocket::GetLocalAddress() const {