Remove UTF string conversion functions from the global namespace.

base/logging.cc

 // 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.
 
 #include "base/logging.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #include <windows.h>
 typedef HANDLE FileHandle;
@@ skipping 476 matching lines @@
   // process that displays its command line. We look for "Debug
   // Message.exe" in the same directory as the application. If it
   // exists, we use it, otherwise, we use a regular message box.
   wchar_t prog_name[MAX_PATH];
   GetModuleFileNameW(NULL, prog_name, MAX_PATH);
   wchar_t* backslash = wcsrchr(prog_name, '\\');
   if (backslash)
     backslash[1] = 0;
   wcscat_s(prog_name, MAX_PATH, L"debug_message.exe");
 
-  std::wstring cmdline = UTF8ToWide(str);
+  std::wstring cmdline = base::UTF8ToWide(str);
   if (cmdline.empty())
     return;
 
   STARTUPINFO startup_info;
   memset(&startup_info, 0, sizeof(startup_info));
   startup_info.cb = sizeof(startup_info);
 
   PROCESS_INFORMATION process_info;
   if (CreateProcessW(prog_name, &cmdline[0], NULL, NULL, false, 0, NULL,
                      NULL, &startup_info, &process_info)) {
@@ skipping 347 matching lines @@
 std::wstring GetLogFileFullPath() {
   if (log_file_name)
     return *log_file_name;
   return std::wstring();
 }
 #endif
 
 }  // namespace logging
 
 std::ostream& operator<<(std::ostream& out, const wchar_t* wstr) {
-  return out << WideToUTF8(std::wstring(wstr));
+  return out << base::WideToUTF8(std::wstring(wstr));
 }