Update from https://crrev.com/308331

base/strings/string_util_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/string_util.h"
 
 #include <math.h>
 #include <stdarg.h>
 
 #include <algorithm>
@@ skipping 651 matching lines @@
 
   // Verify the lower case as well.
   EXPECT_EQ(10, HexDigitToInt('a'));
   EXPECT_EQ(11, HexDigitToInt('b'));
   EXPECT_EQ(12, HexDigitToInt('c'));
   EXPECT_EQ(13, HexDigitToInt('d'));
   EXPECT_EQ(14, HexDigitToInt('e'));
   EXPECT_EQ(15, HexDigitToInt('f'));
 }
 
-// This checks where we can use the assignment operator for a va_list. We need
-// a way to do this since Visual C doesn't support va_copy, but assignment on
-// va_list is not guaranteed to be a copy. See StringAppendVT which uses this
-// capability.
-static void VariableArgsFunc(const char* format, ...) {
-  va_list org;
-  va_start(org, format);
-
-  va_list dup;
-  GG_VA_COPY(dup, org);
-  int i1 = va_arg(org, int);
-  int j1 = va_arg(org, int);
-  char* s1 = va_arg(org, char*);
-  double d1 = va_arg(org, double);
-  va_end(org);
-
-  int i2 = va_arg(dup, int);
-  int j2 = va_arg(dup, int);
-  char* s2 = va_arg(dup, char*);
-  double d2 = va_arg(dup, double);
-
-  EXPECT_EQ(i1, i2);
-  EXPECT_EQ(j1, j2);
-  EXPECT_STREQ(s1, s2);
-  EXPECT_EQ(d1, d2);
-
-  va_end(dup);
-}
-
-TEST(StringUtilTest, VAList) {
-  VariableArgsFunc("%d %d %s %lf", 45, 92, "This is interesting", 9.21);
-}
-
 // Test for Tokenize
 template <typename STR>
 void TokenizeTest() {
   std::vector<STR> r;
   size_t size;
 
   size = Tokenize(STR("This is a string"), STR(" "), &r);
   EXPECT_EQ(4U, size);
   ASSERT_EQ(4U, r.size());
   EXPECT_EQ(r[0], STR("This"));
@@ skipping 544 matching lines @@
   const std::string live = kLive;
   std::string dead = live;
   strncpy(WriteInto(&dead, 5), kDead, 4);
   EXPECT_EQ(kDead, dead);
   EXPECT_EQ(4u, dead.size());
   EXPECT_EQ(kLive, live);
   EXPECT_EQ(4u, live.size());
 }
 
 }  // namespace base