Fix ExtensionServiceTest.ClearExtensionData flakiness

chrome/browser/extensions/extension_disabled_ui.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/extensions/extension_disabled_ui.h"
 
 #include <bitset>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 349 matching lines @@
 }
 
 bool ExtensionDisabledGlobalError::ShouldCloseOnDeactivate() const {
   // Since this indicates that an extension was disabled, we should definitely
   // have the user acknowledge it, rather than having the bubble disappear when
   // a new window pops up.
   return false;
 }
 
 void ExtensionDisabledGlobalError::ExtensionUninstallAccepted() {
-  service_->UninstallExtension(
-      extension_->id(), extensions::UNINSTALL_REASON_EXTENSION_DISABLED, NULL);
+  service_->UninstallExtension(extension_->id(),
+                               extensions::UNINSTALL_REASON_EXTENSION_DISABLED,
+                               base::Bind(&base::DoNothing),
+                               NULL);
 }
 
 void ExtensionDisabledGlobalError::ExtensionUninstallCanceled() {
   // Nothing happens, and the error is still there.
 }
 
 void ExtensionDisabledGlobalError::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
@@ skipping 55 matching lines @@
 void ShowExtensionDisabledDialog(ExtensionService* service,
                                  content::WebContents* web_contents,
                                  const Extension* extension) {
   scoped_ptr<ExtensionInstallPrompt> install_ui(
       new ExtensionInstallPrompt(web_contents));
   // This object manages its own lifetime.
   new ExtensionDisabledDialogDelegate(service, install_ui.Pass(), extension);
 }
 
 }  // namespace extensions