Add "UninstallReason" parameter to ExtensionRegistryObserver::OnExtensionUninstalled.

chrome/browser/extensions/external_install_manager.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 "chrome/browser/extensions/external_install_manager.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 177 matching lines @@
   if (!IsUnacknowledgedExternalExtension(extension))
     return;
 
   LogExternalExtensionEvent(extension, EXTERNAL_EXTENSION_INSTALLED);
 
   UpdateExternalExtensionAlert();
 }
 
 void ExternalInstallManager::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
-    const Extension* extension) {
+    const Extension* extension,
+    extensions::UninstallReason reason) {
   if (IsUnacknowledgedExternalExtension(extension))
     LogExternalExtensionEvent(extension, EXTERNAL_EXTENSION_UNINSTALLED);
 }
 
 bool ExternalInstallManager::IsUnacknowledgedExternalExtension(
     const Extension* extension) const {
   if (!FeatureSwitch::prompt_for_external_extensions()->IsEnabled())
     return false;
 
   return (Manifest::IsExternalLocation(extension->location()) &&
@@ skipping 12 matching lines @@
   // registry observer) for this, but the ExtensionUnloaded notification is
   // not sent out if the extension is disabled (which it is here).
   if (error_.get() &&
       content::Details<const Extension>(details).ptr()->id() ==
           error_->extension_id()) {
     RemoveExternalInstallError();
   }
 }
 
 }  // namespace extensions