New policy to enable/disable HTTP-based downloads.

chrome/browser/policy/proto/chromeos/chrome_device_policy.proto

Index: chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
diff --git a/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto b/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
index 2c095dc5c21fe22c0f0f28ef7e146ce1cb7162cb..36647a1abd022e0656b0056c591253979bfe6cb5 100644
--- a/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
+++ b/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
@@ -202,6 +202,9 @@ message AutoUpdateSettingsProto {
   // True if the device should reboot automatically when an update has been
   // applied and a reboot is required to complete the update process.
   optional bool reboot_after_update = 6;
+
+  // True if AU payloads can be downloaded via HTTP. False otherwise.
+  optional bool http_downloads_enabled = 7 [default = false] ;

[dgarrett, 2013/05/09 22:15:47]

Formatting nit. You probably don't want to space before the ';' at the end of
the line.

 }
 
 message StartUpUrlsProto {