Remove redundant passing around of a "ContainsAutoType" flag.

This flag serves no purpose other than to prevent us walking through a type to
check whether it contains an 'auto' specifier; this duplication of information
is error-prone, does not appear to provide any performance benefit, and will
become less practical once we support C++1z deduced class template types and
eventually constrained types from the Concepts TS.

No functionality change intended.

llvm-svn: 291737
diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index 50f0a22..a8832e9 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -1881,8 +1881,7 @@
       SemaRef.inferObjCARCLifetime(Decl))
     Decl->setInvalidDecl();
 
-  SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false,
-                               /*TypeMayContainAuto=*/false);
+  SemaRef.AddInitializerToDecl(Decl, Init, /*DirectInit=*/false);
   SemaRef.FinalizeDeclaration(Decl);
   SemaRef.CurContext->addHiddenDecl(Decl);
   return false;
@@ -2005,8 +2004,7 @@
 
   // Claim the type doesn't contain auto: we've already done the checking.
   DeclGroupPtrTy RangeGroup =
-      BuildDeclaratorGroup(MutableArrayRef<Decl *>((Decl **)&RangeVar, 1),
-                           /*TypeMayContainAuto=*/ false);
+      BuildDeclaratorGroup(MutableArrayRef<Decl *>((Decl **)&RangeVar, 1));
   StmtResult RangeDecl = ActOnDeclStmt(RangeGroup, RangeLoc, RangeLoc);
   if (RangeDecl.isInvalid()) {
     LoopVar->setInvalidDecl();
@@ -2408,8 +2406,7 @@
     // Attach  *__begin  as initializer for VD. Don't touch it if we're just
     // trying to determine whether this would be a valid range.
     if (!LoopVar->isInvalidDecl() && Kind != BFRK_Check) {
-      AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false,
-                           /*TypeMayContainAuto=*/true);
+      AddInitializerToDecl(LoopVar, DerefExpr.get(), /*DirectInit=*/false);
       if (LoopVar->isInvalidDecl())
         NoteForRangeBeginEndFunction(*this, BeginExpr.get(), BEF_begin);
     }