Move P2P code to content namespace.

content/renderer/p2p/socket_dispatcher.cc

Index: content/renderer/p2p/socket_dispatcher.cc
diff --git a/content/renderer/p2p/socket_dispatcher.cc b/content/renderer/p2p/socket_dispatcher.cc
index 42e7570f96aac34d95afb64c48374e491a33a19b..c2a5d23b1ba9401371efd29dddb43c962cbe3d27 100644
--- a/content/renderer/p2p/socket_dispatcher.cc
+++ b/content/renderer/p2p/socket_dispatcher.cc
@@ -9,6 +9,8 @@
 #include "content/renderer/p2p/host_address_request.h"
 #include "content/renderer/p2p/socket_client.h"
 
+namespace content {
+
 P2PSocketDispatcher::P2PSocketDispatcher(RenderView* render_view)
     : RenderViewObserver(render_view),
       message_loop_(base::MessageLoopProxy::current()),
@@ -142,3 +144,5 @@ P2PSocketClient* P2PSocketDispatcher::GetClient(int socket_id) {
 
   return client;
 }
+
+}  // namespace content