Rewrite references to "wtf/" to "platform/wtf/" in core/layout.

third_party/WebKit/Source/core/layout/ng/geometry/ng_box_strut.cc

 // Copyright 2016 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 "core/layout/ng/geometry/ng_box_strut.h"
 
-#include "wtf/text/WTFString.h"
+#include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
 bool NGBoxStrut::IsEmpty() const {
   return *this == NGBoxStrut();
 }
 
 bool NGBoxStrut::operator==(const NGBoxStrut& other) const {
   return std::tie(other.inline_start, other.inline_end, other.block_start,
                   other.block_end) ==
@@ skipping 29 matching lines @@
   return String::Format("Inline: (%d %d) Block: (%d %d)", inline_start.ToInt(),
                         inline_end.ToInt(), block_start.ToInt(),
                         block_end.ToInt());
 }
 
 std::ostream& operator<<(std::ostream& stream, const NGBoxStrut& value) {
   return stream << value.ToString();
 }
 
 }  // namespace blink