Use Opportunity Iterator to position text fragments in NGLineBuilder

third_party/WebKit/Source/core/layout/ng/geometry/ng_logical_offset.h

 // 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.
 
 #ifndef NGLogicalOffset_h
 #define NGLogicalOffset_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
@@ skipping 20 matching lines @@
   // described by offset + inner_size. Setting inner_size to 0,0 will return
   // the same point.
   // @param outer_size the size of the rect (typically a fragment).
   // @param inner_size the size of the inner rect (typically a child fragment).
   NGPhysicalOffset ConvertToPhysical(NGWritingMode,
                                      TextDirection,
                                      NGPhysicalSize outer_size,
                                      NGPhysicalSize inner_size) const;
 
   bool operator==(const NGLogicalOffset& other) const;
+  bool operator!=(const NGLogicalOffset& other) const;
 
   NGLogicalOffset operator+(const NGLogicalOffset& other) const;
   NGLogicalOffset& operator+=(const NGLogicalOffset& other);
 
   NGLogicalOffset operator-(const NGLogicalOffset& other) const;
   NGLogicalOffset& operator-=(const NGLogicalOffset& other);
 
   bool operator>(const NGLogicalOffset& other) const;
   bool operator>=(const NGLogicalOffset& other) const;
 
   bool operator<(const NGLogicalOffset& other) const;
   bool operator<=(const NGLogicalOffset& other) const;
 
   String ToString() const;
 };
 
 CORE_EXPORT std::ostream& operator<<(std::ostream&, const NGLogicalOffset&);
 
 }  // namespace blink
 
 #endif  // NGLogicalOffset_h