Make much of gfx::Range[F] constexpr.

ui/gfx/range/range.cc

 // Copyright (c) 2012 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 "ui/gfx/range/range.h"
 
 #include <inttypes.h>
 
 #include <algorithm>
-#include <limits>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 
 namespace gfx {
 
-Range::Range()
-    : start_(0),
-      end_(0) {
-}
-
-Range::Range(uint32_t start, uint32_t end)
-    : start_(start),
-      end_(end) {
-}
-
-Range::Range(uint32_t position)
-    : start_(position),
-      end_(position) {
-}
-
-// static
-const Range Range::InvalidRange() {
-  return Range(std::numeric_limits<uint32_t>::max());
-}
-
-bool Range::IsValid() const {
-  return *this != InvalidRange();
-}
-
-uint32_t Range::GetMin() const {
-  return std::min(start(), end());
-}
-
-uint32_t Range::GetMax() const {
-  return std::max(start(), end());
-}
-
-bool Range::operator==(const Range& other) const {
-  return start() == other.start() && end() == other.end();
-}
-
-bool Range::operator!=(const Range& other) const {
-  return !(*this == other);
-}
-
-bool Range::EqualsIgnoringDirection(const Range& other) const {
-  return GetMin() == other.GetMin() && GetMax() == other.GetMax();
-}
-
-bool Range::Intersects(const Range& range) const {
-  return IsValid() && range.IsValid() &&
-      !(range.GetMax() < GetMin() || range.GetMin() >= GetMax());
-}
-
-bool Range::Contains(const Range& range) const {
-  return IsValid() && range.IsValid() &&
-      GetMin() <= range.GetMin() && range.GetMax() <= GetMax();
-}
-
 Range Range::Intersect(const Range& range) const {
   uint32_t min = std::max(GetMin(), range.GetMin());
   uint32_t max = std::min(GetMax(), range.GetMax());
 
   if (min >= max)  // No intersection.
     return InvalidRange();
 
   return Range(min, max);
 }
 
 std::string Range::ToString() const {
   return base::StringPrintf("{%" PRIu32 ",%" PRIu32 "}", start(), end());
 }
 
 std::ostream& operator<<(std::ostream& os, const Range& range) {
   return os << range.ToString();
 }
 
 }  // namespace gfx