Move wtf_unittests to platform/wtf/.

third_party/WebKit/Source/wtf/ASCIICTypeTest.cpp

-// Copyright 2015 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 "wtf/ASCIICType.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace WTF {
-
-TEST(ASCIICTypeTest, ASCIICaseFoldTable) {
-  LChar symbol = 0xff;
-  while (symbol--) {
-    EXPECT_EQ(toASCIILower<LChar>(symbol), ASCIICaseFoldTable[symbol]);
-  }
-}
-
-}  // namespace WTF