New extension API: "tab.socketAddress"

chrome/browser/tab_contents/navigation_entry.h

Index: chrome/browser/tab_contents/navigation_entry.h
===================================================================
--- chrome/browser/tab_contents/navigation_entry.h	(revision 71766)
+++ chrome/browser/tab_contents/navigation_entry.h	(working copy)
@@ -370,6 +370,15 @@
     return has_post_data_;
   }
 
+  // Remote address of the socket which fetched this resource, for presenting
+  // to inquisitive users.  Can be "ipv4:port", "[ipv6]:port", or empty.
+  void set_socket_address(const std::string& addr) {
+    socket_address_ = addr;
+  }
+  const std::string& socket_address() const {
+    return socket_address_;
+  }
+
   // Enumerations of the possible restore types.
   enum RestoreType {
     // The entry has been restored is from the last session.
@@ -415,6 +424,7 @@
   PageTransition::Type transition_type_;
   GURL user_typed_url_;
   bool has_post_data_;
+  std::string socket_address_;
   RestoreType restore_type_;
 
   // This is a cached version of the result of GetTitleForDisplay. It prevents