Moves ash content specific tests into ash_content_unittests

ash/test/ash_test_views_delegate.h

 // 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.
 
 #ifndef ASH_TEST_ASH_TEST_VIEWS_DELEGATE_H_
 #define ASH_TEST_ASH_TEST_VIEWS_DELEGATE_H_
 
 #include "base/macros.h"
 #include "ui/views/test/test_views_delegate.h"
 
 namespace ash {
 namespace test {
 
 // Ash specific ViewsDelegate. In addition to creating a TestWebContents this
 // parents widget with no parent/context to the shell. This is created by
 // default AshTestHelper.
 class AshTestViewsDelegate : public views::TestViewsDelegate {
  public:
   AshTestViewsDelegate();
   ~AshTestViewsDelegate() override;
 
   // Overriden from TestViewsDelegate.
-  content::WebContents* CreateWebContents(
-      content::BrowserContext* browser_context,
-      content::SiteInstance* site_instance) override;
   void OnBeforeWidgetInit(
       views::Widget::InitParams* params,
       views::internal::NativeWidgetDelegate* delegate) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AshTestViewsDelegate);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_ASH_TEST_VIEWS_DELEGATE_H_