Appropriate handling for Cellular First devices.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index ca2273ecef8a1fe8f67e40053ee4081163392803..68016fdb8e384764e0173f645faa9728b275521e 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -37,12 +37,6 @@ const char kAggressiveTabDiscardThreshold[] = "aggressive-tab-discard";
 
 const char kAggressiveThreshold[] = "aggressive";
 
-// If this flag is set, enable data roaming in the cellular network by default
-// upon system start if it's an unmanaged device. This flag is used by Rialto
-// device to obtain device policy during OOBE since the Rialto device has no
-// display and and only connects over cell.
-const char kAllowDataRoamingByDefault[] = "allow-data-roaming-by-default";
-
 // If this flag is passed, failed policy fetches will not cause profile
 // initialization to fail. This is useful for tests because it means that
 // tests don't have to mock out the policy infrastructure.
@@ -88,6 +82,15 @@ const char kArtifactsDir[] = "artifacts-dir";
 // Possible values: parallel|postpone. Default: parallel.
 const char kAshWebUIInit[] = "ash-webui-init";
 
+// If this flag is set, it indicates that this device is a "Cellular First"
+// device. Cellular First devices use cellular telephone data networks as
+// their primary means of connecting to the internet.
+// Setting this flag has two consequences:
+// 1. Cellular data roaming will be enabled by default.
+// 2. UpdateEngine will be instructed to allow auto-updating over cellular
+//    data connections.
+const char kCellularFirst[] = "cellular-first";
+
 // Default large wallpaper to use for kids accounts (as path to trusted,
 // non-user-writable JPEG file).
 const char kChildWallpaperLarge[] = "child-wallpaper-large";
@@ -508,5 +511,9 @@ bool IsGaiaIdMigrationStarted() {
          kTestCrosGaiaIdMigrationStarted;
 }
 
+bool IsCellularFirstDevice() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(kCellularFirst);
+}
+
 }  // namespace switches
 }  // namespace chromeos