Rename various classes from PCH to AST.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 7a2a5af..e0aa1b4 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -304,7 +304,7 @@
 
 /// \brief Gathers information from ASTReader that will be used to initialize
 /// a Preprocessor.
-class PCHInfoCollector : public PCHReaderListener {
+class PCHInfoCollector : public ASTReaderListener {
   LangOptions &LangOpt;
   HeaderSearch &HSI;
   std::string &TargetTriple;
@@ -463,7 +463,7 @@
   Reader->setListener(new PCHInfoCollector(LangInfo, HeaderInfo, TargetTriple,
                                            Predefines, Counter));
 
-  switch (Reader->ReadPCH(Filename)) {
+  switch (Reader->ReadAST(Filename)) {
   case ASTReader::Success:
     break;