Enable extensions error button test that was failing on stable.

chrome/browser/ui/webui/extensions/extension_settings_browsertest.h

 // Copyright 2013 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 CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_
 
 #include "chrome/browser/extensions/extension_test_notification_observer.h"
+#include "chrome/common/extensions/features/feature_channel.h"
 #include "chrome/test/base/web_ui_browser_test.h"
 #include "extensions/browser/test_management_policy.h"
 #include "extensions/common/extension.h"
+#include "extensions/common/feature_switch.h"
 
 class Profile;
 
 // C++ test fixture used by extension_settings_browsertest.js.
 class ExtensionSettingsUIBrowserTest : public WebUIBrowserTest {
  public:
   ExtensionSettingsUIBrowserTest();
   ~ExtensionSettingsUIBrowserTest() override;
 
  protected:
@@ skipping 11 matching lines @@
   void InstallErrorsExtension();
 
   void InstallSharedModule();
 
   void InstallPackagedApp();
 
   void AddManagedPolicyProvider();
 
   void SetAutoConfirmUninstall();
 
+  // Enables the error console so errors are displayed in the extensions page.
+  void EnableErrorConsole();
+
  private:
   bool WaitForExtensionViewsToLoad();
   const extensions::Extension* InstallUnpackedExtension(
       const base::FilePath& path);
   const extensions::Extension* InstallExtension(const base::FilePath& path);
 
   scoped_ptr<ExtensionTestNotificationObserver> observer_;
 
   // The default profile to be used.
   Profile* profile_;
 
   // Used to simulate managed extensions (by being registered as a provider).
   extensions::TestManagementPolicyProvider policy_provider_;
 
   base::FilePath test_data_dir_;
 
+  // Used to enable the error console.
+  scoped_ptr<extensions::FeatureSwitch::ScopedOverride> error_console_override_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsUIBrowserTest);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_