Move P2P code to content namespace.

content/renderer/p2p/p2p_transport_impl.cc

Index: content/renderer/p2p/p2p_transport_impl.cc
diff --git a/content/renderer/p2p/p2p_transport_impl.cc b/content/renderer/p2p/p2p_transport_impl.cc
index 3f65b3e0259aa23a75f3addda6f2c618c9883e64..c83d10fb0b8f62d091af8808c17f1bb7d9cfb49b 100644
--- a/content/renderer/p2p/p2p_transport_impl.cc
+++ b/content/renderer/p2p/p2p_transport_impl.cc
@@ -15,6 +15,8 @@
 #include "third_party/libjingle/source/talk/p2p/base/p2ptransportchannel.h"
 #include "third_party/libjingle/source/talk/p2p/client/basicportallocator.h"
 
+namespace content {
+
 P2PTransportImpl::P2PTransportImpl(
     talk_base::NetworkManager* network_manager,
     talk_base::PacketSocketFactory* socket_factory)
@@ -137,3 +139,5 @@ void P2PTransportImpl::OnTcpConnected(int result) {
   state_ = static_cast<State>(STATE_READABLE | STATE_WRITABLE);
   event_handler_->OnStateChange(state_);
 }
+
+}  // namespace content