Add PCH support for #import.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69987 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/PPLexerChange.cpp b/lib/Lex/PPLexerChange.cpp
index 6f61c65..2a05ba3 100644
--- a/lib/Lex/PPLexerChange.cpp
+++ b/lib/Lex/PPLexerChange.cpp
@@ -179,7 +179,7 @@
   if (CurPPLexer) {  // Not ending a macro, ignore it.
     if (const IdentifierInfo *ControllingMacro = 
           CurPPLexer->MIOpt.GetControllingMacroAtEndOfFile()) {
-      // Okay, this has a controlling macro, remember in PerFileInfo.
+      // Okay, this has a controlling macro, remember in HeaderFileInfo.
       if (const FileEntry *FE = 
             SourceMgr.getFileEntryForID(CurPPLexer->getFileID()))
         HeaderInfo.SetFileControllingMacro(FE, ControllingMacro);