Move sys_string_conversions to base/strings.

base/strings/sys_string_conversions_mac_unittest.mm

 // 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.
 
 #import <Foundation/Foundation.h>
 
 #include "base/string16.h"
-#include "base/sys_string_conversions.h"
+#include "base/strings/sys_string_conversions.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace base {
+
 TEST(SysStrings, ConversionsFromNSString) {
-  EXPECT_STREQ("Hello, world!",
-               base::SysNSStringToUTF8(@"Hello, world!").c_str());
+  EXPECT_STREQ("Hello, world!", SysNSStringToUTF8(@"Hello, world!").c_str());
 
   // Conversions should be able to handle a NULL value without crashing.
-  EXPECT_STREQ("", base::SysNSStringToUTF8(nil).c_str());
-  EXPECT_EQ(string16(), base::SysNSStringToUTF16(nil));
+  EXPECT_STREQ("", SysNSStringToUTF8(nil).c_str());
+  EXPECT_EQ(string16(), SysNSStringToUTF16(nil));
 }
+
+}  // namespace base