Create a VTableContext class and start moving CodeGenVTables methods to it

llvm-svn: 140502
diff --git a/clang/lib/CodeGen/CGRTTI.cpp b/clang/lib/CodeGen/CGRTTI.cpp
index 1ce69d6..a1105d2 100644
--- a/clang/lib/CodeGen/CGRTTI.cpp
+++ b/clang/lib/CodeGen/CGRTTI.cpp
@@ -879,7 +879,7 @@
     CharUnits Offset;
     if (Base->isVirtual())
       Offset = 
-        CGM.getVTables().getVirtualBaseOffsetOffset(RD, BaseDecl);
+        CGM.getVTableContext().getVirtualBaseOffsetOffset(RD, BaseDecl);
     else {
       const ASTRecordLayout &Layout = CGM.getContext().getASTRecordLayout(RD);
       Offset = Layout.getBaseClassOffset(BaseDecl);