Move PtrUtilTest.cpp to wtf_unittests.

third_party/WebKit/Source/platform/wtf/BUILD.gn

 # 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.
 
 # The below is a temporary setup during the WTF migration project:
 # https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ
 #
 # We are moving wtf/ files to platform/wtf/ incrementally, thus, conceptually,
 # the "wtf" target in wtf/BUILD.gn is being split into two, in a way that
 # only wtf/ can refer the contents in platform/wtf/.
@@ skipping 330 matching lines @@
     "ASCIICTypeTest.cpp",
     "AssertionsTest.cpp",
     "DequeTest.cpp",
     "FunctionalTest.cpp",
     "HashMapTest.cpp",
     "HashSetTest.cpp",
     "ListHashSetTest.cpp",
     "MathExtrasTest.cpp",
     "OptionalTest.cpp",
     "PassRefPtrTest.cpp",
+    "PtrUtilTest.cpp",
     "RefPtrTest.cpp",
     "StringExtrasTest.cpp",
     "StringHasherTest.cpp",
     "TimeTest.cpp",
     "TreeNodeTest.cpp",
     "TypeTraitsTest.cpp",
     "VectorTest.cpp",
     "dtoa_test.cpp",
     "testing/RunAllTests.cpp",
     "text/AtomicStringTest.cpp",
@@ skipping 29 matching lines @@
   ]
 
   deps = [
     ":platform_wtf",
     "//base",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }