Prefix error_code with std.

llvm-svn: 210840
diff --git a/clang-tools-extra/clang-apply-replacements/tool/ClangApplyReplacementsMain.cpp b/clang-tools-extra/clang-apply-replacements/tool/ClangApplyReplacementsMain.cpp
index 2e5271b..d0af35e 100644
--- a/clang-tools-extra/clang-apply-replacements/tool/ClangApplyReplacementsMain.cpp
+++ b/clang-tools-extra/clang-apply-replacements/tool/ClangApplyReplacementsMain.cpp
@@ -27,7 +27,6 @@
 using namespace llvm;
 using namespace clang;
 using namespace clang::replace;
-using std::error_code;
 
 static cl::opt<std::string> Directory(cl::Positional, cl::Required,
                                       cl::desc("<Search Root Directory>"));
@@ -223,7 +222,7 @@
   TUReplacements TUs;
   TUReplacementFiles TURFiles;
 
-  error_code ErrorCode =
+  std::error_code ErrorCode =
       collectReplacementsFromDirectory(Directory, TUs, TURFiles, Diagnostics);
 
   if (ErrorCode) {