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

third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.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/ng_block_layout_algorithm.h"
 
 #include "core/layout/ng/inline/ng_inline_node.h"
 #include "core/layout/ng/ng_absolute_utils.h"
 #include "core/layout/ng/ng_block_child_iterator.h"
 #include "core/layout/ng/ng_box_fragment.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_constraint_space_builder.h"
 #include "core/layout/ng/ng_floats_utils.h"
 #include "core/layout/ng/ng_fragment.h"
 #include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_layout_opportunity_iterator.h"
 #include "core/layout/ng/ng_length_utils.h"
 #include "core/layout/ng/ng_out_of_flow_layout_part.h"
 #include "core/layout/ng/ng_space_utils.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/LengthFunctions.h"
-#include "wtf/Optional.h"
+#include "platform/wtf/Optional.h"
 
 namespace blink {
 namespace {
 
 // Returns if a child may be affected by its clear property. I.e. it will
 // actually clear a float.
 bool ClearanceMayAffectLayout(
     const NGConstraintSpace& space,
     const Vector<RefPtr<NGFloatingObject>>& unpositioned_floats,
     const ComputedStyle& child_style) {
@@ skipping 485 matching lines @@
       DCHECK(builder_.BfcOffset());
       space_available -= curr_bfc_offset_.block_offset;
     }
   }
   space_builder_.SetFragmentainerSpaceAvailable(space_available);
 
   return space_builder_.ToConstraintSpace(
       FromPlatformWritingMode(child_style.GetWritingMode()));
 }
 }  // namespace blink