Add a preference for why an extension is disabled.

chrome/browser/extensions/extension_management_apitest.cc

Index: chrome/browser/extensions/extension_management_apitest.cc
diff --git a/chrome/browser/extensions/extension_management_apitest.cc b/chrome/browser/extensions/extension_management_apitest.cc
index 812bc53388d496cdc3ca3207d0a7a6867f8d3707..1bcda9ef78d592a9beb4e4911c3f3c0956773d3f 100644
--- a/chrome/browser/extensions/extension_management_apitest.cc
+++ b/chrome/browser/extensions/extension_management_apitest.cc
@@ -46,11 +46,10 @@ class ExtensionManagementApiTest : public ExtensionApiTest {
     ASSERT_TRUE(LoadExtension(basedir.AppendASCII("permissions")));
 
     // Load 2 disabled items.
-    ExtensionService* service = browser()->profile()->GetExtensionService();
     ASSERT_TRUE(LoadExtension(basedir.AppendASCII("disabled_extension")));
-    service->DisableExtension(last_loaded_extension_id_);
+    DisableExtension(last_loaded_extension_id_);
     ASSERT_TRUE(LoadExtension(basedir.AppendASCII("disabled_app")));
-    service->DisableExtension(last_loaded_extension_id_);
+    DisableExtension(last_loaded_extension_id_);
   }
 
   // Load an app, and wait for a message from app "management/launch_on_install"