Move WriteInto to base namespace.

base/strings/string_util.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 <ctype.h>
 #include <errno.h>
 #include <math.h>
 #include <stdarg.h>
@@ skipping 790 matching lines @@
 }
 
 void ReplaceSubstringsAfterOffset(std::string* str,
                                   size_t start_offset,
                                   StringPiece find_this,
                                   StringPiece replace_with) {
   DoReplaceSubstringsAfterOffset<std::string>(
       str, start_offset, find_this, replace_with, true);  // Replace all.
 }
 
+template <class string_type>
+inline typename string_type::value_type* WriteIntoT(string_type* str,
+                                                    size_t length_with_null) {
+  DCHECK_GT(length_with_null, 1u);
+  str->reserve(length_with_null);
+  str->resize(length_with_null - 1);
+  return &((*str)[0]);
+}
+
+char* WriteInto(std::string* str, size_t length_with_null) {
+  return WriteIntoT(str, length_with_null);
+}
+
+char16* WriteInto(base::string16* str, size_t length_with_null) {
+  return WriteIntoT(str, length_with_null);
+}
+
 }  // namespace base
 
 template<typename STR>
 static STR JoinStringT(const std::vector<STR>& parts, const STR& sep) {
   if (parts.empty())
     return STR();
 
   STR result(parts[0]);
   typename std::vector<STR>::const_iterator iter = parts.begin();
   ++iter;
@@ skipping 135 matching lines @@
 }
 
 }  // namespace
 
 size_t base::strlcpy(char* dst, const char* src, size_t dst_size) {
   return lcpyT<char>(dst, src, dst_size);
 }
 size_t base::wcslcpy(wchar_t* dst, const wchar_t* src, size_t dst_size) {
   return lcpyT<wchar_t>(dst, src, dst_size);
 }