Switch to static_assert in base/.

base/strings/string16.h

 // Copyright 2013 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_STRINGS_STRING16_H_
 #define BASE_STRINGS_STRING16_H_
 
 // WHAT:
 // A version of std::basic_string that provides 2-byte characters even when
 // wchar_t is not implemented as a 2-byte type. You can access this class as
@@ skipping 46 matching lines @@
 BASE_EXPORT char16* c16memmove(char16* s1, const char16* s2, size_t n);
 BASE_EXPORT char16* c16memcpy(char16* s1, const char16* s2, size_t n);
 BASE_EXPORT char16* c16memset(char16* s, char16 c, size_t n);
 
 struct string16_char_traits {
   typedef char16 char_type;
   typedef int int_type;
 
   // int_type needs to be able to hold each possible value of char_type, and in
   // addition, the distinct value of eof().
-  COMPILE_ASSERT(sizeof(int_type) > sizeof(char_type), unexpected_type_width);
+  static_assert(sizeof(int_type) > sizeof(char_type),
+                "int must be larger than 16 bits wide");
 
   typedef std::streamoff off_type;
   typedef mbstate_t state_type;
   typedef std::fpos<state_type> pos_type;
 
   static void assign(char_type& c1, const char_type& c2) {
     c1 = c2;
   }
 
   static bool eq(const char_type& c1, const char_type& c2) {
@@ skipping 97 matching lines @@
 // boundaries, such as in statically-linked executables.
 //
 // TODO(mark): File this bug with Apple and update this note with a bug number.
 
 extern template
 class BASE_EXPORT std::basic_string<base::char16, base::string16_char_traits>;
 
 #endif  // WCHAR_T_IS_UTF32
 
 #endif  // BASE_STRINGS_STRING16_H_