Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/browser/state_store.cc

Index: extensions/browser/state_store.cc
diff --git a/extensions/browser/state_store.cc b/extensions/browser/state_store.cc
index ced256a5374474190e5c4e7eae6fd9664390c6df..82d7caaa4e92e33c8e5eddff238a49bf9e3f8582 100644
--- a/extensions/browser/state_store.cc
+++ b/extensions/browser/state_store.cc
@@ -159,7 +159,8 @@ void StateStore::OnExtensionWillBeInstalled(
 
 void StateStore::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
-    const Extension* extension) {
+    const Extension* extension,
+    extensions::UninstallReason reason) {
   RemoveKeysForExtension(extension->id());
 }