Add P2PDatagramSocket and P2PStreamSocket interfaces.

remoting/protocol/fake_datagram_socket.h

Index: remoting/protocol/fake_datagram_socket.h
diff --git a/remoting/protocol/fake_datagram_socket.h b/remoting/protocol/fake_datagram_socket.h
index 9669c0bd01cccc2be970dbe21b46bee6c1edfb32..d076ca52d3006e8281901ec8daeff9386a03072d 100644
--- a/remoting/protocol/fake_datagram_socket.h
+++ b/remoting/protocol/fake_datagram_socket.h
@@ -12,8 +12,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
-#include "net/socket/socket.h"
 #include "remoting/protocol/datagram_channel_factory.h"
+#include "remoting/protocol/p2p_socket.h"
 
 namespace base {
 class SingleThreadTaskRunner;
@@ -22,7 +22,7 @@ class SingleThreadTaskRunner;
 namespace remoting {
 namespace protocol {
 
-// FakeDatagramSocket implement net::StreamSocket interface. All data written to
+// FakeDatagramSocket implement P2PStreamSocket interface. All data written to
 // FakeDatagramSocket is stored in a buffer returned by written_packets().
 // Read() reads data from another buffer that can be set with
 // AppendInputPacket(). Pending reads are supported, so if there is a pending
@@ -32,7 +32,7 @@ namespace protocol {
 // PairWith() method, e.g.: a->PairWith(b). After this all data
 // written to |a| can be read from |b| and vice versa. Two connected
 // sockets |a| and |b| must be created and used on the same thread.
-class FakeDatagramSocket : public net::Socket {
+class FakeDatagramSocket : public P2PDatagramSocket {
  public:
   FakeDatagramSocket();
   ~FakeDatagramSocket() override;
@@ -53,7 +53,7 @@ class FakeDatagramSocket : public net::Socket {
 
   base::WeakPtr<FakeDatagramSocket> GetWeakPtr();
 
-  // net::Socket implementation.
+  // P2PDatagramSocket implementation.
   int Read(net::IOBuffer* buf,
            int buf_len,
            const net::CompletionCallback& callback) override;