Issue 768 - Switch from TR1 to C++11

src/DefaultFileSystem.cpp

Index: src/DefaultFileSystem.cpp
===================================================================
--- a/src/DefaultFileSystem.cpp
+++ b/src/DefaultFileSystem.cpp
@@ -61,27 +61,27 @@ namespace
   // file paths as they are.
   std::string NormalizePath(const std::string& path)
   {
     return path;
   }
 #endif
 }
 
-std::tr1::shared_ptr<std::istream>
+std::shared_ptr<std::istream>
 DefaultFileSystem::Read(const std::string& path) const
 {
-  std::tr1::shared_ptr<std::istream> result(new std::ifstream(NormalizePath(path).c_str()));
+  std::shared_ptr<std::istream> result(new std::ifstream(NormalizePath(path).c_str()));
   if (result->fail())
     throw RuntimeErrorWithErrno("Failed to open " + path);
   return result;
 }
 
 void DefaultFileSystem::Write(const std::string& path,
-                              std::tr1::shared_ptr<std::istream> data)
+                              std::shared_ptr<std::istream> data)
 {
   std::ofstream file(NormalizePath(path).c_str(), std::ios_base::out | std::ios_base::binary);
   file << Utils::Slurp(*data);
 }
 
 void DefaultFileSystem::Move(const std::string& fromPath,
                              const std::string& toPath)
 {