Replace CHECK(x && y) with two separate CHECK() calls

webrtc/rtc_base/proxyserver.cc

Index: webrtc/rtc_base/proxyserver.cc
diff --git a/webrtc/rtc_base/proxyserver.cc b/webrtc/rtc_base/proxyserver.cc
index 18dceac5be50d82a9139f3c0eb1d60db3e47fe64..c00e24319e0ea23ae4be442b737b8308bedb99aa 100644
--- a/webrtc/rtc_base/proxyserver.cc
+++ b/webrtc/rtc_base/proxyserver.cc
@@ -43,7 +43,8 @@ SocketAddress ProxyServer::GetServerAddress() {
 }
 
 void ProxyServer::OnAcceptEvent(AsyncSocket* socket) {
-  RTC_DCHECK(socket != nullptr && socket == server_socket_.get());
+  RTC_DCHECK(socket);
+  RTC_DCHECK_EQ(socket, server_socket_.get());
   AsyncSocket* int_socket = socket->Accept(nullptr);
   AsyncProxyServerSocket* wrapped_socket = WrapSocket(int_socket);
   AsyncSocket* ext_socket = ext_factory_->CreateAsyncSocket(ext_ip_.family(),
@@ -84,7 +85,8 @@ ProxyBinding::~ProxyBinding() = default;
 
 void ProxyBinding::OnConnectRequest(AsyncProxyServerSocket* socket,
                                    const SocketAddress& addr) {
-  RTC_DCHECK(!connected_ && ext_socket_.get() != nullptr);
+  RTC_DCHECK(!connected_);
+  RTC_DCHECK(ext_socket_);
   ext_socket_->Connect(addr);
   // TODO: handle errors here
 }