Use the CGCXXABI member on CodeGenTypes.

CodeGenTypes already has a reference to a CGCXXABI. Use this directly
rather than going through CodeGenModule to get to the same information.

This is consistent with other references to CGCXXABI in CodeGenTypes
functions defined in CGCall.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191854 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index 84dd7bf..fa25222 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -182,8 +182,7 @@
 
   if (MD->isInstance()) {
     // The abstract case is perfectly fine.
-    const CXXRecordDecl *ThisType =
-        CGM.getCXXABI().getThisArgumentTypeForMethod(MD);
+    const CXXRecordDecl *ThisType = TheCXXABI.getThisArgumentTypeForMethod(MD);
     return arrangeCXXMethodType(ThisType, prototype.getTypePtr());
   }