Rewrite std::string("") to std::string(), Linux edition.

base/files/file_path.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/files/file_path.h"
 
 #include <string.h>
 #include <algorithm>
 
 #include "base/basictypes.h"
@@ skipping 534 matching lines @@
 // See file_path.h for a discussion of the encoding of paths on POSIX
 // platforms.  These encoding conversion functions are not quite correct.
 
 string16 FilePath::LossyDisplayName() const {
   return WideToUTF16(SysNativeMBToWide(path_));
 }
 
 std::string FilePath::MaybeAsASCII() const {
   if (IsStringASCII(path_))
     return path_;
-  return "";
+  return std::string();
 }
 
 std::string FilePath::AsUTF8Unsafe() const {
 #if defined(OS_MACOSX) || defined(OS_CHROMEOS)
   return value();
 #else
   return WideToUTF8(SysNativeMBToWide(value()));
 #endif
 }
 
@@ skipping 685 matching lines @@
 #else
   return *this;
 #endif
 }
 
 }  // namespace base
 
 void PrintTo(const base::FilePath& path, std::ostream* out) {
   *out << path.value();
 }