Revert of Improve linearized pdf load/show time.

pdf/range_set.h

Index: pdf/range_set.h
diff --git a/pdf/range_set.h b/pdf/range_set.h
deleted file mode 100644
index b615999285a5ac72d4e81b8b91cc8357e0fb20e7..0000000000000000000000000000000000000000
--- a/pdf/range_set.h
+++ /dev/null
@@ -1,77 +0,0 @@
-// 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.
-
-// Defines a set of geometric ranges, and standard operations on it.
-
-#ifndef PDF_RANGE_SET_H_
-#define PDF_RANGE_SET_H_
-
-#include <ostream>
-#include <set>
-#include <string>
-
-#include "ui/gfx/range/range.h"
-
-namespace chrome_pdf {
-
-class RangeSet {
- public:
-  RangeSet();
-  explicit RangeSet(const gfx::Range& range);
-  ~RangeSet();
-
-  RangeSet(const RangeSet& range_set);
-  RangeSet(RangeSet&& range_set);
-  RangeSet& operator=(const RangeSet& other);
-
-  bool operator==(const RangeSet& other) const;
-  bool operator!=(const RangeSet& other) const;
-
-  bool Contains(uint32_t point) const;
-  bool Contains(const gfx::Range& range) const;
-  bool Contains(const RangeSet& range_set) const;
-
-  bool Intersects(const gfx::Range& range) const;
-  bool Intersects(const RangeSet& range_set) const;
-
-  void Union(const gfx::Range& range);
-  void Union(const RangeSet& range_set);
-
-  void Intersect(const gfx::Range& range);
-  void Intersect(const RangeSet& range_set);
-
-  void Subtract(const gfx::Range& range);
-  void Subtract(const RangeSet& range_set);
-
-  void Xor(const gfx::Range& range);
-  void Xor(const RangeSet& range_set);
-
-  bool IsEmpty() const;
-  void Clear();
-
-  gfx::Range First() const;
-  gfx::Range Last() const;
-  std::string ToString() const;
-
-  struct range_compare {
-    bool operator()(const gfx::Range& lval, const gfx::Range& rval) const {
-      return lval.start() < rval.start();
-    }
-  };
-
-  using RangesContainer = std::set<gfx::Range, range_compare>;
-
-  const RangesContainer& ranges() const { return ranges_; }
-  size_t Size() const { return ranges_.size(); }
-
- private:
-  RangesContainer ranges_;
-};
-
-}  // namespace chrome_pdf
-
-std::ostream& operator<<(std::ostream& os,
-                         const chrome_pdf::RangeSet& range_set);
-
-#endif  // PDF_RANGE_SET_H_