Instead of iterating over FileID's, have PTH generation iterate over the
content cache directly.  Content cache has a 1-1 mapping with fileentries,
whereas multiple FileIDs can be the same FileEntry.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62401 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index fa29d0a..5a14c13 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -112,8 +112,7 @@
 Lexer::Lexer(SourceLocation fileloc, const LangOptions &features,
              const char *BufStart, const char *BufEnd,
              const llvm::MemoryBuffer *FromFile)
-  : PreprocessorLexer(), FileLoc(fileloc),
-    Features(features) {
+  : FileLoc(fileloc), Features(features) {
       
   Is_PragmaLexer = false;
   InitCharacterInfo();