Remove base::underlying_type, replace uses with std::underlying_type

base/logging.h

 // 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.
 
 #ifndef BASE_LOGGING_H_
 #define BASE_LOGGING_H_
 
 #include <stddef.h>
 
 #include <cassert>
@@ skipping 624 matching lines @@
 }
 
 // We need overloads for enums that don't support operator<<.
 // (i.e. scoped enums where no operator<< overload was declared).
 template <typename T>
 inline typename std::enable_if<
     !base::internal::SupportsOstreamOperator<const T&>::value &&
         std::is_enum<T>::value,
     void>::type
 MakeCheckOpValueString(std::ostream* os, const T& v) {
-  (*os) << static_cast<typename base::underlying_type<T>::type>(v);
+  (*os) << static_cast<typename std::underlying_type<T>::type>(v);
 }
 
 // We need an explicit overload for std::nullptr_t.
 BASE_EXPORT void MakeCheckOpValueString(std::ostream* os, std::nullptr_t p);
 
 // Build the error message string.  This is separate from the "Impl"
 // function template because it is not performance critical and so can
 // be out of line, while the "Impl" code should be inline.  Caller
 // takes ownership of the returned string.
 template<class t1, class t2>
@@ skipping 483 matching lines @@
 #elif NOTIMPLEMENTED_POLICY == 5
 #define NOTIMPLEMENTED() do {\
   static bool logged_once = false;\
   LOG_IF(ERROR, !logged_once) << NOTIMPLEMENTED_MSG;\
   logged_once = true;\
 } while(0);\
 EAT_STREAM_PARAMETERS
 #endif
 
 #endif  // BASE_LOGGING_H_