Make customization documents singletons.

chrome/browser/chromeos/login/helper.h

Index: chrome/browser/chromeos/login/helper.h
diff --git a/chrome/browser/chromeos/login/helper.h b/chrome/browser/chromeos/login/helper.h
index 05d417943b12b171c07cb1795e31c5c40055fde1..508dcaf39a302f51d02a0c1cefcbf0c74533c45d 100644
--- a/chrome/browser/chromeos/login/helper.h
+++ b/chrome/browser/chromeos/login/helper.h
@@ -33,7 +33,6 @@ class Widget;
 
 namespace chromeos {
 
-class StartupCustomizationDocument;
 class NetworkLibrary;
 
 // View that provides interface for start/stop throbber above the view.
@@ -109,10 +108,6 @@ GURL GetAccountRecoveryHelpUrl();
 // Ethernet > WiFi > Cellular. Same for connecting network.
 string16 GetCurrentNetworkName(NetworkLibrary* network_library);
 
-// Load OEM partner startup customization manifest
-// containing locale, timezone, EULA, etc.
-const chromeos::StartupCustomizationDocument* LoadStartupManifest();
-
 // Define the constants in |login| namespace to avoid potential
 // conflict with other chromeos components.
 namespace login {