Update from https://crrev.com/315085

base/strings/stringprintf_unittest.cc

Index: base/strings/stringprintf_unittest.cc
diff --git a/base/strings/stringprintf_unittest.cc b/base/strings/stringprintf_unittest.cc
index 321747869a076415232d16884c3198cf688c35e7..c49637c23f256fe321414576c9b6a4eaac45136c 100644
--- a/base/strings/stringprintf_unittest.cc
+++ b/base/strings/stringprintf_unittest.cc
@@ -163,19 +163,6 @@ TEST(StringPrintfTest, Invalid) {
 }
 #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;