Fix bug where auto-connect setting is not immediately saved....

Fix bug where auto-connect setting is not immediately saved.
Also fix Google-A wifi auto-reconnect to also try Google if Google-A is not available or not setup to auto-connect.
BUG=chromium-os:3054
TEST=manual test. when you change auto-connect setting, make sure that it's set properly when you immediately open the network options dialog again.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=50161

[Charlie Lee, 2010-06-14 21:58:35]

http://codereview.chromium.org/2853001/diff/1/2
File chrome/browser/chromeos/cros/network_library.cc (right):

http://codereview.chromium.org/2853001/diff/1/2#newcode260
chrome/browser/chromeos/cros/network_library.cc:260: bool
NetworkLibraryImpl::ConnectToPreferredNetworkIfAvailable() {
I've tested this manually. Reconnect to Google-A still works like before.

http://codereview.chromium.org/2853001/diff/1/2#newcode385
chrome/browser/chromeos/cros/network_library.cc:385: *wifi = network;
In addition to making the call to libcros, we also need to update or local
cached right away.

http://codereview.chromium.org/2853001/diff/1/3
File chrome/browser/chromeos/cros/network_library.h (right):

http://codereview.chromium.org/2853001/diff/1/3#newcode37
chrome/browser/chromeos/cros/network_library.h:37: STATE_READY : STATE_IDLE; }
Just fixing 2 methods that are used for testing only. We previously were never
calling them with false, but may in the future.

http://codereview.chromium.org/2853001/diff/1/3#newcode444
chrome/browser/chromeos/cros/network_library.h:444: WifiNetwork*
GetWifiNetworkByPath(const std::string& path);
Decided to have this method return a pointer to the actual data instead of
copying it. So I refactored the above method also.

[Charlie Lee, 2010-06-16 22:59:30]

Zel, I also added the fallback to use Google wifi if Google-A is not available.
Please take a look.

[zel, 2010-06-17 05:40:04]

LGTM