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

third_party/WebKit/Source/core/layout/ng/geometry/ng_physical_rect.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_physical_rect.h"
 
-#include "wtf/text/WTFString.h"
+#include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
 NGPixelSnappedPhysicalRect NGPhysicalRect::SnapToDevicePixels() const {
   NGPixelSnappedPhysicalRect snapped_rect;
   snapped_rect.left = RoundToInt(location.left);
   snapped_rect.top = RoundToInt(location.top);
   snapped_rect.width = SnapSizeToPixel(size.width, location.left);
   snapped_rect.height = SnapSizeToPixel(size.height, location.top);
 
   return snapped_rect;
 }
 
 bool NGPhysicalRect::operator==(const NGPhysicalRect& other) const {
   return other.location == location && other.size == size;
 }
 
 String NGPhysicalRect::ToString() const {
   return String::Format("%s,%s %sx%s", location.left.ToString().Ascii().Data(),
                         location.top.ToString().Ascii().Data(),
                         size.width.ToString().Ascii().Data(),
                         size.height.ToString().Ascii().Data());
 }
 
 std::ostream& operator<<(std::ostream& os, const NGPhysicalRect& value) {
   return os << value.ToString();
 }
 
 }  // namespace blink