Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/browser/extension_registry.cc

Index: extensions/browser/extension_registry.cc
diff --git a/extensions/browser/extension_registry.cc b/extensions/browser/extension_registry.cc
index 30801bc8bb542b310e8c65f9d0bd811e2948e4c9..0c1a80de8fc0d63be47f3273e6438c4f4d90eb58 100644
--- a/extensions/browser/extension_registry.cc
+++ b/extensions/browser/extension_registry.cc
@@ -76,11 +76,13 @@ void ExtensionRegistry::TriggerOnInstalled(const Extension* extension,
                         browser_context_, extension, is_update));
 }
 
-void ExtensionRegistry::TriggerOnUninstalled(const Extension* extension) {
+void ExtensionRegistry::TriggerOnUninstalled(const Extension* extension,
+                                             UninstallReason reason) {
   DCHECK(!GenerateInstalledExtensionsSet()->Contains(extension->id()));
-  FOR_EACH_OBSERVER(ExtensionRegistryObserver,
-                    observers_,
-                    OnExtensionUninstalled(browser_context_, extension));
+  FOR_EACH_OBSERVER(
+      ExtensionRegistryObserver,
+      observers_,
+      OnExtensionUninstalled(browser_context_, extension, reason));
 }
 
 const Extension* ExtensionRegistry::GetExtensionById(const std::string& id,