Enable lucid sleep (wake on wi-fi SSID) and add to Privacy options.

chrome/browser/chromeos/net/wake_on_wifi_manager.cc

Index: chrome/browser/chromeos/net/wake_on_wifi_manager.cc
diff --git a/chrome/browser/chromeos/net/wake_on_wifi_manager.cc b/chrome/browser/chromeos/net/wake_on_wifi_manager.cc
index 6233784a9e3d945c232a270325f87cee62430773..bc77158b9f4a17dd6ac49e477808b2502c7b019a 100644
--- a/chrome/browser/chromeos/net/wake_on_wifi_manager.cc
+++ b/chrome/browser/chromeos/net/wake_on_wifi_manager.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/login/login_state.h"
 #include "chromeos/network/device_state.h"
 #include "chromeos/network/network_device_handler.h"
@@ -172,6 +173,8 @@ WakeOnWifiManager::~WakeOnWifiManager() {
 void WakeOnWifiManager::OnPreferenceChanged(
     WakeOnWifiManager::WakeOnWifiFeature feature) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableWakeOnWifi))
+    return;

[stevenjb, 2014/12/17 22:22:54]

In cases like this where we might be changing the polarity of this in a branch,
I would add a chromeos::switches::WakeOnWifiEnabled() method in
chromeos_switches.cc/h and use that.

[michaelpg, 2014/12/22 22:23:18]

I don't think we would change the polarity of it -- I thought we would just send
an update to include this flag to kill the feature rather than have to push a
binary update. or is that not something we're capable of and the default flags
are baked into the build?

[stevenjb (google-dont-use), 2014/12/22 23:30:22]

We generally just change the executable on the branch. As far as I am aware
adding a flag isn't any easier, unless we are using a Finch experiment to
selectively enable a feature (in which case this would need to be off by default
anyway). iirc we only use this flag a couple of times so it's not a big deal,
just a suggestion.

   if (feature == current_feature_)
     return;