Rename PCHWriter to ASTWriter

llvm-svn: 111463
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index f689404..9d4419d 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -1789,8 +1789,8 @@
   
   std::vector<unsigned char> Buffer;
   llvm::BitstreamWriter Stream(Buffer);
-  PCHWriter Writer(Stream);
-  Writer.WritePCH(getSema(), 0, 0);
+  ASTWriter Writer(Stream);
+  Writer.WriteAST(getSema(), 0, 0);
   
   // Write the generated bitstream to "Out".
   if (!Buffer.empty())