Removed redundant std::string -> string conversions.

PiperOrigin-RevId: 210127626

3 files changed, 3 insertions, 3 deletions

diff --git a/tensorflow/stream_executor/lib/env.h b/tensorflow/stream_executor/lib/env.h
index 3ef8deb72e..d78bbfd425 100644
--- a/tensorflow/stream_executor/lib/env.h
+++ b/tensorflow/stream_executor/lib/env.h
@@ -32,7 +32,7 @@ inline Status FileExists(const string& filename) {
 }
 
 inline Status FileExists(const port::StringPiece& filename) {
-  return Env::Default()->FileExists(std::string(filename));
+  return Env::Default()->FileExists(string(filename));
 }
 
 }  // namespace port
diff --git a/tensorflow/stream_executor/lib/path.cc b/tensorflow/stream_executor/lib/path.cc
index 58a862206c..3d3da103e1 100644
--- a/tensorflow/stream_executor/lib/path.cc
+++ b/tensorflow/stream_executor/lib/path.cc
@@ -33,7 +33,7 @@ string JoinPathImpl(std::initializer_list<port::StringPiece> paths) {
     if (path.empty()) continue;
 
     if (result.empty()) {
-      result = std::string(path);
+      result = string(path);
       continue;
     }
 
diff --git a/tensorflow/stream_executor/lib/str_util.h b/tensorflow/stream_executor/lib/str_util.h
index b02fe4f56f..e77dfcef76 100644
--- a/tensorflow/stream_executor/lib/str_util.h
+++ b/tensorflow/stream_executor/lib/str_util.h
@@ -31,7 +31,7 @@ inline string StripSuffixString(port::StringPiece str, port::StringPiece suffix)
   if (tensorflow::str_util::EndsWith(str, suffix)) {
     str.remove_suffix(suffix.size());
   }
-  return std::string(str);
+  return string(str);
 }
 
 using tensorflow::str_util::Lowercase;