Move P2P code to content namespace.

content/browser/renderer_host/p2p/socket_host_udp.h

Index: content/browser/renderer_host/p2p/socket_host_udp.h
diff --git a/content/browser/renderer_host/p2p/socket_host_udp.h b/content/browser/renderer_host/p2p/socket_host_udp.h
index 9294e8ace5ac868f3d49640478803367dd4ad252..d49f2c4ae27bba7a158b87ba4169cfd0c2bfe07e 100644
--- a/content/browser/renderer_host/p2p/socket_host_udp.h
+++ b/content/browser/renderer_host/p2p/socket_host_udp.h
@@ -17,6 +17,8 @@
 #include "net/base/ip_endpoint.h"
 #include "net/udp/udp_server_socket.h"
 
+namespace content {
+
 class P2PSocketHostUdp : public P2PSocketHost {
  public:
   P2PSocketHostUdp(IPC::Message::Sender* message_sender,
@@ -59,4 +61,6 @@ class P2PSocketHostUdp : public P2PSocketHost {
   DISALLOW_COPY_AND_ASSIGN(P2PSocketHostUdp);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_UDP_H_