Revert "Enable positional parameters for base::vsnprintf and base::vswprintf on Windows."

base/strings/stringprintf_unittest.cc

 // 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.
 
 #include "base/strings/stringprintf.h"
 
 #include <errno.h>
 
 #include "base/basictypes.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 145 matching lines @@
   wchar_t invalid[2];
   invalid[0] = 0xffff;
   invalid[1] = 0;
 
   std::wstring out;
   SStringPrintf(&out, L"%ls", invalid);
   EXPECT_STREQ(L"", out.c_str());
 }
 #endif
 
-// Test that the positional parameters work.
-TEST(StringPrintfTest, PositionalParameters) {
-  std::string out;
-  SStringPrintf(&out, "%1$s %1$s", "test");
-  EXPECT_STREQ("test test", out.c_str());
-
-#if defined(OS_WIN)
-  std::wstring wout;
-  SStringPrintf(&wout, L"%1$ls %1$ls", L"test");
-  EXPECT_STREQ(L"test test", wout.c_str());
-#endif
-}
-
 // Test that StringPrintf and StringAppendV do not change errno.
 TEST(StringPrintfTest, StringPrintfErrno) {
   errno = 1;
   EXPECT_EQ("", StringPrintf("%s", ""));
   EXPECT_EQ(1, errno);
   std::string out;
   StringAppendVTestHelper(&out, "%d foo %s", 1, "bar");
   EXPECT_EQ(1, errno);
 }
 
 }  // namespace base