Create a VTableContext class and start moving CodeGenVTables methods to it

llvm-svn: 140502
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
index d0ec3eb..dcac6a8 100644
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -509,7 +509,7 @@
   // Get the function pointer (or index if this is a virtual function).
   llvm::Constant *MemPtr[2];
   if (MD->isVirtual()) {
-    uint64_t Index = CGM.getVTables().getMethodVTableIndex(MD);
+    uint64_t Index = CGM.getVTableContext().getMethodVTableIndex(MD);
 
     const ASTContext &Context = getContext();
     CharUnits PointerWidth =