[dart:io] Reland: Adds Platform.localeName

runtime/bin/platform.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_BIN_PLATFORM_H_
 #define RUNTIME_BIN_PLATFORM_H_
 
 #include "bin/builtin.h"
 #include "platform/globals.h"
 
@@ skipping 34 matching lines @@
   static const char* LibraryPrefix();
 
   // Returns a string representing the operating system's shared library
   // extension (e.g. 'so', 'dll', ...). The returned string should not be
   // deallocated by the caller.
   static const char* LibraryExtension();
 
   // Extracts the local hostname.
   static bool LocalHostname(char* buffer, intptr_t buffer_length);
 
+  static const char* LocaleName();
+
   // Extracts the environment variables for the current process.  The array of
   // strings is Dart_ScopeAllocated. The number of elements in the array is
   // returned in the count argument.
   static char** Environment(intptr_t* count);
 
   static const char* ResolveExecutablePath();
 
   // Stores the executable name.
   static void SetExecutableName(const char* executable_name) {
     executable_name_ = executable_name;
@@ skipping 30 matching lines @@
   static char** argv_;  // VM flags are argv_[1 ... script_index_ - 1]
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Platform);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_PLATFORM_H_