Move P2P code to content namespace.

content/browser/renderer_host/p2p/socket_host_tcp.h

Index: content/browser/renderer_host/p2p/socket_host_tcp.h
diff --git a/content/browser/renderer_host/p2p/socket_host_tcp.h b/content/browser/renderer_host/p2p/socket_host_tcp.h
index 6cfc3a5feb234516266f5b10510576995081f7c6..c2757cd238849c3a03ce7aefa6fd4dca34abcded 100644
--- a/content/browser/renderer_host/p2p/socket_host_tcp.h
+++ b/content/browser/renderer_host/p2p/socket_host_tcp.h
@@ -22,6 +22,8 @@ class GrowableIOBuffer;
 class StreamSocket;
 }  // namespace net
 
+namespace content {
+
 class P2PSocketHostTcp : public P2PSocketHost {
  public:
   P2PSocketHostTcp(IPC::Message::Sender* message_sender,
@@ -71,4 +73,6 @@ class P2PSocketHostTcp : public P2PSocketHost {
   DISALLOW_COPY_AND_ASSIGN(P2PSocketHostTcp);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_TCP_H_