ChromeOS: Enable Gaia v2 API by default.

chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
index 88d1809a9abd3acf5daf281fb3c848f03445b8dd..0f10fc1ecbb8fc7d56234c76a8e1dee36beb1dd1 100644
--- a/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.cc
@@ -352,12 +352,15 @@ void GaiaScreenHandler::LoadGaiaWithVersion(
     params.SetString("gaiaPath", eafe_path);
   }
 
+  // Easy bootstrap is not v2-compatible
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kCrosGaiaApiV1)) {
-    params.SetString("chromeOSApiVersion", "1");
-  } else if (use_easy_bootstrap_) {
-    // Easy bootstrap is not v2-compatible
+          switches::kCrosGaiaApiV1) ||
+      use_easy_bootstrap_) {
     params.SetString("chromeOSApiVersion", "1");
+  } else {
+    // This enables GLIF MM UI for the online Gaia screen by default.
+    // (see https://crbug.com/709244 ).
+    params.SetString("chromeOSApiVersion", "2");
   }
 
   frame_state_ = FRAME_STATE_LOADING;