Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

chrome/browser/ui/app_list/extension_app_model_builder.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/app_list/extension_app_model_builder.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 142 matching lines @@
     const extensions::Extension* extension,
     extensions::UnloadedExtensionInfo::Reason reason) {
   ExtensionAppItem* item = GetExtensionAppItem(extension->id());
   if (!item)
     return;
   item->UpdateIcon();
 }
 
 void ExtensionAppModelBuilder::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
-    const extensions::Extension* extension) {
+    const extensions::Extension* extension,
+    extensions::UninstallReason reason) {
   if (service_) {
     DVLOG(2) << service_ << ": OnExtensionUninstalled: "
              << extension->id().substr(0, 8);
     service_->RemoveItem(extension->id());
     return;
   }
   model_->DeleteItem(extension->id());
 }
 
 void ExtensionAppModelBuilder::OnDisabledExtensionUpdated(
@@ skipping 141 matching lines @@
     app_list::AppListItem* item = item_list->item_at(idx + 1);
     if (item->GetItemType() == ExtensionAppItem::kItemType) {
       next = static_cast<ExtensionAppItem*>(item);
       break;
     }
   }
   // item->Move will call set_position, overriding the item's position.
   if (prev || next)
     static_cast<ExtensionAppItem*>(item)->Move(prev, next);
 }