Show proper message in about Chrome OS page

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

Index: chrome/browser/ui/webui/help/help_utils_chromeos.h
diff --git a/chrome/browser/ui/webui/help/help_utils_chromeos.h b/chrome/browser/ui/webui/help/help_utils_chromeos.h
index ab58c49b8096c69a223d1b708d08cfc51d84c9c0..1afb8c5b7a82993c0f7eb3ad208b3d596dfdda44 100644
--- a/chrome/browser/ui/webui/help/help_utils_chromeos.h
+++ b/chrome/browser/ui/webui/help/help_utils_chromeos.h
@@ -11,8 +11,12 @@
 
 namespace help_utils_chromeos {
 
-// Returns true if update over cellular networks is enabled.
-bool IsUpdateOverCellularAllowed();
+// Returns true if updates over cellular networks are allowed. If |interactive|
+// is true (e.g. the user clicked on a 'check for updates' button), updates over
+// cellular are allowed unless prohibited by policy. If |interactive| is false,
+// updates over cellular may be allowed by default for the device type, or by
+// policy.
+bool IsUpdateOverCellularAllowed(bool interactive);
 
 // Returns localized name for the connection |type|.
 base::string16 GetConnectionTypeAsUTF16(const std::string& type);