Update to Chromium version 101.0.4951.0 (#982481)

Known issues:
- chrome: Some ceftests are failing due to bfcache same-site enabled by default
  (see issue #3301)

include/base/cef_cxx17_backports.h

@@ -35,17 +35,9 @@
 
 #if defined(USING_CHROMIUM_INCLUDES)
 // When building CEF include the Chromium header directly.
-// TODO(cef): Change to "base/cxx17_backports.h" in M93.
-#include "base/stl_util.h"
+#include "base/cxx17_backports.h"
 #else  // !USING_CHROMIUM_INCLUDES
-// The following is substantially similar to the Chromium implementation.
-// If the Chromium implementation diverges the below implementation should be
-// updated to match.
-
-#include <array>
-#include <initializer_list>
-#include <memory>
-#include <string>
+// The following was removed from Chromium in https://crrev.com/78734f77be.
 
 namespace base {
 
@@ -61,71 +53,6 @@ constexpr size_t size(const T (&array)[N]) noexcept {
   return N;
 }
 
-// C++14 implementation of C++17's std::empty():
-// http://en.cppreference.com/w/cpp/iterator/empty
-template <typename Container>
-constexpr auto empty(const Container& c) -> decltype(c.empty()) {
-  return c.empty();
-}
-
-template <typename T, size_t N>
-constexpr bool empty(const T (&array)[N]) noexcept {
-  return false;
-}
-
-template <typename T>
-constexpr bool empty(std::initializer_list<T> il) noexcept {
-  return il.size() == 0;
-}
-
-// C++14 implementation of C++17's std::data():
-// http://en.cppreference.com/w/cpp/iterator/data
-template <typename Container>
-constexpr auto data(Container& c) -> decltype(c.data()) {
-  return c.data();
-}
-
-// std::basic_string::data() had no mutable overload prior to C++17 [1].
-// Hence this overload is provided.
-// Note: str[0] is safe even for empty strings, as they are guaranteed to be
-// null-terminated [2].
-//
-// [1] http://en.cppreference.com/w/cpp/string/basic_string/data
-// [2] http://en.cppreference.com/w/cpp/string/basic_string/operator_at
-template <typename CharT, typename Traits, typename Allocator>
-CharT* data(std::basic_string<CharT, Traits, Allocator>& str) {
-  return std::addressof(str[0]);
-}
-
-template <typename Container>
-constexpr auto data(const Container& c) -> decltype(c.data()) {
-  return c.data();
-}
-
-template <typename T, size_t N>
-constexpr T* data(T (&array)[N]) noexcept {
-  return array;
-}
-
-template <typename T>
-constexpr const T* data(std::initializer_list<T> il) noexcept {
-  return il.begin();
-}
-
-// std::array::data() was not constexpr prior to C++17 [1].
-// Hence these overloads are provided.
-//
-// [1] https://en.cppreference.com/w/cpp/container/array/data
-template <typename T, size_t N>
-constexpr T* data(std::array<T, N>& array) noexcept {
-  return !array.empty() ? &array[0] : nullptr;
-}
-
-template <typename T, size_t N>
-constexpr const T* data(const std::array<T, N>& array) noexcept {
-  return !array.empty() ? &array[0] : nullptr;
-}
-
 }  // namespace base
 
 #endif  // !USING_CHROMIUM_INCLUDES