Move string files in base/ to the string subdirectory.

base/strings/stringprintf_unittest.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/strings/stringprintf.h"
+
 #include <errno.h>
 
 #include "base/basictypes.h"
-#include "base/stringprintf.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 // A helper for the StringAppendV test that follows.
 //
 // Just forwards its args to StringAppendV.
 static void StringAppendVTestHelper(std::string* out, const char* format, ...) {
@@ skipping 159 matching lines @@
 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