Use style::CONTEXT_TEXTFIELD for Combobox and Textfield

chrome/browser/ui/views/payments/validating_textfield_unittest.cc

 // Copyright 2017 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/ui/views/payments/validating_textfield.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/views/payments/validation_delegate.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/views/controls/textfield/textfield.h"
+#include "ui/views/test/views_test_base.h"
 
 namespace payments {
 
-class ValidatingTextfieldTest : public testing::Test {
+class ValidatingTextfieldTest : public views::ViewsTestBase {
  public:
   ValidatingTextfieldTest() {}
   ~ValidatingTextfieldTest() override {}
 
  protected:
   class TestValidationDelegate : public ValidationDelegate {
    public:
     TestValidationDelegate() {}
     ~TestValidationDelegate() override {}
 
@@ skipping 41 matching lines @@
   // On further text adjustements, the validation runs now. Set a valid string
   // (<=5 characters).
   textfield->SetText(base::ASCIIToUTF16("good"));
   textfield->OnContentsChanged();
 
   // No longer invalid.
   EXPECT_FALSE(textfield->invalid());
 }
 
 }  // namespace payments