Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

chrome/browser/ui/extensions/extension_enable_flow.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/extensions/extension_enable_flow.h"
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 124 matching lines @@
     content::BrowserContext* browser_context,
     const Extension* extension) {
   if (extension->id() == extension_id_) {
     StopObserving();
     CheckPermissionAndMaybePromptUser();
   }
 }
 
 void ExtensionEnableFlow::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
-    const Extension* extension) {
+    const Extension* extension,
+    extensions::UninstallReason reason) {
   if (extension->id() == extension_id_) {
     StopObserving();
     delegate_->ExtensionEnableFlowAborted(false);
   }
 }
 
 void ExtensionEnableFlow::InstallUIProceed() {
   ExtensionService* service =
       extensions::ExtensionSystem::Get(profile_)->extension_service();
 
@@ skipping 13 matching lines @@
   delegate_->ExtensionEnableFlowAborted(user_initiated);
   // |delegate_| may delete us.
 }
 
 content::WebContents* ExtensionEnableFlow::OpenURL(
     const content::OpenURLParams& params) {
   chrome::ScopedTabbedBrowserDisplayer displayer(
       profile_, chrome::GetActiveDesktop());
   return displayer.browser()->OpenURL(params);
 }