Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

extensions/browser/test_extension_registry_observer.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_
 #define EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_
 
 #include "base/scoped_observer.h"
 #include "extensions/browser/extension_registry_observer.h"
 
@@ skipping 15 matching lines @@
  private:
   class Waiter;
 
   // ExtensionRegistryObserver.
   virtual void OnExtensionWillBeInstalled(
       content::BrowserContext* browser_context,
       const Extension* extension,
       bool is_update,
       bool from_ephemeral,
       const std::string& old_name) OVERRIDE;
-  virtual void OnExtensionUninstalled(content::BrowserContext* browser_context,
-                                      const Extension* extension) OVERRIDE;
+  virtual void OnExtensionUninstalled(
+      content::BrowserContext* browser_context,
+      const Extension* extension,
+      extensions::UninstallReason reason) OVERRIDE;
   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
                                  const Extension* extension) OVERRIDE;
   virtual void OnExtensionUnloaded(
       content::BrowserContext* browser_context,
       const Extension* extension,
       UnloadedExtensionInfo::Reason reason) OVERRIDE;
 
   scoped_ptr<Waiter> will_be_installed_waiter_;
   scoped_ptr<Waiter> uninstalled_waiter_;
   scoped_ptr<Waiter> loaded_waiter_;
   scoped_ptr<Waiter> unloaded_waiter_;
 
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   std::string extension_id_;
 
   DISALLOW_COPY_AND_ASSIGN(TestExtensionRegistryObserver);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_TEST_EXTENSION_REGISTRY_OBSERVER_H_