Remove redundant SetUp() override from TextfieldTest.

ui/views/controls/textfield/textfield_unittest.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 "ui/views/controls/textfield/textfield.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 141 matching lines @@
       : widget_(NULL),
         textfield_(NULL),
         model_(NULL),
         input_method_(NULL),
         on_before_user_action_(0),
         on_after_user_action_(0),
         copied_to_clipboard_(ui::CLIPBOARD_TYPE_LAST) {
   }
 
   // ::testing::Test:
-  void SetUp() override { ViewsTestBase::SetUp(); }
-
   void TearDown() override {
     if (widget_)
       widget_->Close();
     ViewsTestBase::TearDown();
   }
 
   ui::ClipboardType GetAndResetCopiedToClipboard() {
     ui::ClipboardType clipboard_type = copied_to_clipboard_;
     copied_to_clipboard_ = ui::CLIPBOARD_TYPE_LAST;
     return clipboard_type;
@@ skipping 1888 matching lines @@
   TextfieldDestroyerController controller(textfield_);
   EXPECT_TRUE(controller.target());
 
   // Send a key to trigger OnKeyEvent().
   SendKeyEvent('X');
 
   EXPECT_FALSE(controller.target());
 }
 
 }  // namespace views