Add Diagnostic to Indexer, and have it keep its own FileManager instead of taking an external reference (which was leaked in the case of the CIndex library).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82429 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/CIndex/CIndex.cpp b/tools/CIndex/CIndex.cpp
index b2fca60..55bcd93 100644
--- a/tools/CIndex/CIndex.cpp
+++ b/tools/CIndex/CIndex.cpp
@@ -187,7 +187,8 @@
 
 CXIndex clang_createIndex() 
 {
-  return new Indexer(*new Program(), *new FileManager());
+  // FIXME: Program is leaked.
+  return new Indexer(*new Program());
 }
 
 void clang_disposeIndex(CXIndex CIdx)