Remove the last uses of 'using std::error_code'

This finishes the transition to std::error_code.

llvm-svn: 210877
diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index 0904211..babeb53 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -20,17 +20,17 @@
 
 using namespace llvm;
 using namespace llvm::sys;
-using std::error_code;
 
-#define ASSERT_NO_ERROR(x) \
-  if (error_code ASSERT_NO_ERROR_ec = x) { \
-    SmallString<128> MessageStorage; \
-    raw_svector_ostream Message(MessageStorage); \
-    Message << #x ": did not return errc::success.\n" \
-            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
-            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
-    GTEST_FATAL_FAILURE_(MessageStorage.c_str()); \
-  } else {}
+#define ASSERT_NO_ERROR(x)                                                     \
+  if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
+    SmallString<128> MessageStorage;                                           \
+    raw_svector_ostream Message(MessageStorage);                               \
+    Message << #x ": did not return errc::success.\n"                          \
+            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
+            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
+    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
+  } else {                                                                     \
+  }
 
 namespace {
 
@@ -357,7 +357,7 @@
   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
             std::errc::no_such_file_or_directory);
 
-  error_code EC = fs::status(TempPath2.c_str(), B);
+  std::error_code EC = fs::status(TempPath2.c_str(), B);
   EXPECT_EQ(EC, std::errc::no_such_file_or_directory);
   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
 
@@ -411,7 +411,7 @@
 }
 
 TEST_F(FileSystemTest, DirectoryIteration) {
-  error_code ec;
+  std::error_code ec;
   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
     ASSERT_NO_ERROR(ec);
 
@@ -583,7 +583,7 @@
   ASSERT_NO_ERROR(
       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
   // Map in temp file and add some content
-  error_code EC;
+  std::error_code EC;
   StringRef Val("hello there");
   {
     fs::mapped_file_region mfr(FileDescriptor,