libclang: refactor CXStringPool: make it a class

We are not exposing the pool or string buffers to libclang users, so no need to
maintain a procedural interface.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173595 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 949db52..9eacd97 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -66,7 +66,7 @@
   CXTranslationUnit D = new CXTranslationUnitImpl();
   D->CIdx = CIdx;
   D->TheASTUnit = AU;
-  D->StringPool = createCXStringPool();
+  D->StringPool = new CXStringPool();
   D->Diagnostics = 0;
   D->OverridenCursorsPool = createOverridenCXCursorsPool();
   D->FormatContext = 0;
@@ -2820,7 +2820,7 @@
       return;
 
     delete cxtu::getASTUnit(CTUnit);
-    disposeCXStringPool(CTUnit->StringPool);
+    delete CTUnit->StringPool;
     delete static_cast<CXDiagnosticSetImpl *>(CTUnit->Diagnostics);
     disposeOverridenCXCursorsPool(CTUnit->OverridenCursorsPool);
     delete CTUnit->FormatContext;