Re-uprev to r462023.

Previous uprevs didn't include several CLs. This re-uprev's to the
r462023.
cf) Missing CLs I found.
https://codereview.chromium.org/2556563002
https://codereview.chromium.org/2754483002
https://codereview.chromium.org/2171833002
https://codereview.chromium.org/2778183003
https://codereview.chromium.org/2500473002
https://codereview.chromium.org/2173523002
https://codereview.chromium.org/2666423002
https://codereview.chromium.org/2723423002
https://codereview.chromium.org/2789463002
https://codereview.chromium.org/2723083004
https://codereview.chromium.org/2637843002
https://codereview.chromium.org/2785943004
https://codereview.chromium.org/2657603004
https://codereview.chromium.org/2774363003
https://codereview.chromium.org/2776853002
https://codereview.chromium.org/2736053003
https://codereview.chromium.org/2779413002
https://codereview.chromium.org/2782503002
https://codereview.chromium.org/2782083003
https://codereview.chromium.org/2399213005
https://codereview.chromium.org/2787383002
https://codereview.chromium.org/2790523004
https://codereview.chromium.org/2787533002
https://codereview.chromium.org/2780983003
https://codereview.chromium.org/2790403003
https://codereview.chromium.org/2747673002
https://codereview.chromium.org/2778173003
https://codereview.chromium.org/2788613004
https://codereview.chromium.org/2781983003
https://codereview.chromium.org/2774223003

Bug: 73270448
Test: Built and ran libchrome_test locally. Run treehugger.
Change-Id: I5e76096d4fcf660571275cce5f4a980a8bb574fe

1 files changed, 0 insertions, 61 deletions

diff --git a/base/template_util.h b/base/template_util.h
index 42552107cf..10154dbbeb 100644
--- a/base/template_util.h
+++ b/base/template_util.h
@@ -51,46 +51,8 @@ template <class T> struct is_non_const_reference : std::false_type {};
 template <class T> struct is_non_const_reference<T&> : std::true_type {};
 template <class T> struct is_non_const_reference<const T&> : std::false_type {};
 
-// is_assignable
-
 namespace internal {
 
-template <typename First, typename Second>
-struct SelectSecond {
-  using type = Second;
-};
-
-struct Any {
-  Any(...);
-};
-
-// True case: If |Lvalue| can be assigned to from |Rvalue|, then the return
-// value is a true_type.
-template <class Lvalue, class Rvalue>
-typename internal::SelectSecond<
-    decltype((std::declval<Lvalue>() = std::declval<Rvalue>())),
-    std::true_type>::type
-IsAssignableTest(Lvalue&&, Rvalue&&);
-
-// False case: Otherwise the return value is a false_type.
-template <class Rvalue>
-std::false_type IsAssignableTest(internal::Any, Rvalue&&);
-
-// Default case: Neither Lvalue nor Rvalue is void. Uses IsAssignableTest to
-// determine the type of IsAssignableImpl.
-template <class Lvalue,
-          class Rvalue,
-          bool = std::is_void<Lvalue>::value || std::is_void<Rvalue>::value>
-struct IsAssignableImpl
-    : public std::common_type<decltype(
-          internal::IsAssignableTest(std::declval<Lvalue>(),
-                                     std::declval<Rvalue>()))>::type {};
-
-// Void case: Either Lvalue or Rvalue is void. Then the type of IsAssignableTest
-// is false_type.
-template <class Lvalue, class Rvalue>
-struct IsAssignableImpl<Lvalue, Rvalue, true> : public std::false_type {};
-
 // Uses expression SFINAE to detect whether using operator<< would work.
 template <typename T, typename = void>
 struct SupportsOstreamOperator : std::false_type {};
@@ -102,29 +64,6 @@ struct SupportsOstreamOperator<T,
 
 }  // namespace internal
 
-// TODO(crbug.com/554293): Remove this when all platforms have this in the std
-// namespace.
-template <class Lvalue, class Rvalue>
-struct is_assignable : public internal::IsAssignableImpl<Lvalue, Rvalue> {};
-
-// is_copy_assignable is true if a T const& is assignable to a T&.
-// TODO(crbug.com/554293): Remove this when all platforms have this in the std
-// namespace.
-template <class T>
-struct is_copy_assignable
-    : public is_assignable<typename std::add_lvalue_reference<T>::type,
-                           typename std::add_lvalue_reference<
-                               typename std::add_const<T>::type>::type> {};
-
-// is_move_assignable is true if a T&& is assignable to a T&.
-// TODO(crbug.com/554293): Remove this when all platforms have this in the std
-// namespace.
-template <class T>
-struct is_move_assignable
-    : public is_assignable<typename std::add_lvalue_reference<T>::type,
-                           const typename std::add_rvalue_reference<T>::type> {
-};
-
 // underlying_type produces the integer type backing an enum type.
 // TODO(crbug.com/554293): Remove this when all platforms have this in the std
 // namespace.