Add a menu item to content_shell to open devtools to make it more discoverable.

net/server/http_server.h

Index: net/server/http_server.h
===================================================================
--- net/server/http_server.h	(revision 150609)
+++ net/server/http_server.h	(working copy)
@@ -16,6 +16,7 @@
 
 class HttpConnection;
 class HttpServerRequestInfo;
+class IPEndPoint;
 class WebSocket;
 
 class HttpServer : public StreamListenSocket::Delegate,
@@ -53,6 +54,9 @@
   void Send500(int connection_id, const std::string& message);
   void Close(int connection_id);
 
+  // Copies the local address to |address|. Returns a network error code.
+  int GetLocalAddress(IPEndPoint* address);
+
   // ListenSocketDelegate
   virtual void DidAccept(StreamListenSocket* server,
                          StreamListenSocket* socket) OVERRIDE;