Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

chrome/browser/policy/policy_browsertest.cc

Index: chrome/browser/policy/policy_browsertest.cc
diff --git a/chrome/browser/policy/policy_browsertest.cc b/chrome/browser/policy/policy_browsertest.cc
index 29041a50607d91cd6685da25d313f039c4757a5c..cfeb5f334dd3be5bdb30d7e1e3c92965c00ba333 100644
--- a/chrome/browser/policy/policy_browsertest.cc
+++ b/chrome/browser/policy/policy_browsertest.cc
@@ -124,6 +124,7 @@
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
+#include "extensions/browser/uninstall_reason.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
@@ -708,7 +709,7 @@ class PolicyTest : public InProcessBrowserTest {
                        : chrome::NOTIFICATION_EXTENSION_UNINSTALL_NOT_ALLOWED,
         content::NotificationService::AllSources());
     extension_service()->UninstallExtension(
-        id, ExtensionService::UNINSTALL_REASON_FOR_TESTING, NULL);
+        id, extensions::UNINSTALL_REASON_FOR_TESTING, NULL);
     observer.Wait();
   }