Enable auto update over cellular when roaming is on by default

chrome/browser/ui/webui/help/help_utils_chromeos.cc

Index: chrome/browser/ui/webui/help/help_utils_chromeos.cc
diff --git a/chrome/browser/ui/webui/help/help_utils_chromeos.cc b/chrome/browser/ui/webui/help/help_utils_chromeos.cc
index d370f936df302572958a5bc204edef742af6df69..a211f5a39da93fe84c95e1130bece17f9e3723b4 100644
--- a/chrome/browser/ui/webui/help/help_utils_chromeos.cc
+++ b/chrome/browser/ui/webui/help/help_utils_chromeos.cc
@@ -8,10 +8,12 @@
 
 #include <algorithm>
 
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/grit/generated_resources.h"
+#include "chromeos/chromeos_switches.h"
 #include "chromeos/network/network_type_pattern.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
@@ -26,6 +28,12 @@ const bool kDefaultUpdateOverCellularAllowed = false;
 namespace help_utils_chromeos {
 
 bool IsUpdateOverCellularAllowed() {
+  // Devices with a hard-coded policy to allow cellular roaming implicitly also
+  // allow updates over cellular; see http://crbug.com/640721.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+        chromeos::switches::kAllowDataRoamingByDefault))
+    return true;
+
   chromeos::CrosSettings* settings = chromeos::CrosSettings::Get();
   if (!settings)
     return kDefaultUpdateOverCellularAllowed;