Implement action interface in network_menu.js for 'connect'.

chrome/browser/chromeos/status/network_dropdown_button.cc

Index: chrome/browser/chromeos/status/network_dropdown_button.cc
diff --git a/chrome/browser/chromeos/status/network_dropdown_button.cc b/chrome/browser/chromeos/status/network_dropdown_button.cc
index 159a7035dd49248d89fe30ffa7146ebf4b065c43..2f83d6e42c0d5c2a91a7973dee40ee4d0a7010ac 100644
--- a/chrome/browser/chromeos/status/network_dropdown_button.cc
+++ b/chrome/browser/chromeos/status/network_dropdown_button.cc
@@ -73,6 +73,9 @@ void NetworkDropdownButton::NetworkChanged(NetworkLibrary* cros) {
   // user selected. For example user selected WiFi network but we have Ethernet
   // connection and Chrome OS device will actually use Ethernet.
 
+  // This gets called on initialization, so any changes should be reflected
+  // in CrosMock::SetNetworkLibraryStatusAreaExpectations().
+
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   if (CrosLibrary::Get()->EnsureLoaded()) {
     // Always show the higher priority connection first. Ethernet then wifi.