Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/browser/test_extension_registry_observer.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/test_extension_registry_observer.h"
 
 #include "content/public/test/test_utils.h"
 #include "extensions/browser/extension_registry.h"
 
 namespace extensions {
@@ skipping 62 matching lines @@
     const Extension* extension,
     bool is_update,
     bool from_ephemeral,
     const std::string& old_name) {
   if (extension->id() == extension_id_)
     will_be_installed_waiter_->OnObserved();
 }
 
 void TestExtensionRegistryObserver::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
-    const Extension* extension) {
+    const Extension* extension,
+    extensions::UninstallReason reason) {
   if (extension->id() == extension_id_)
     uninstalled_waiter_->OnObserved();
 }
 
 void TestExtensionRegistryObserver::OnExtensionLoaded(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   if (extension->id() == extension_id_)
     loaded_waiter_->OnObserved();
 }
 
 void TestExtensionRegistryObserver::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UnloadedExtensionInfo::Reason reason) {
   if (extension->id() == extension_id_)
     unloaded_waiter_->OnObserved();
 }
 
 }  // namespace extensions