[C++11] Replacing iterators redecls_begin() and redecls_end() with iterator_range redecls(). Updating all of the usages of the iterators with range-based for loops, which allows the begin/end forms to be removed entirely.

llvm-svn: 203179
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 0e968f1..2d35d5c 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -12405,11 +12405,9 @@
       bool IsExplicitInstantiationDeclaration
         = Class->getTemplateSpecializationKind()
                                       == TSK_ExplicitInstantiationDeclaration;
-      for (TagDecl::redecl_iterator R = Class->redecls_begin(),
-                                 REnd = Class->redecls_end();
-           R != REnd; ++R) {
+      for (auto R : Class->redecls()) {
         TemplateSpecializationKind TSK
-          = cast<CXXRecordDecl>(*R)->getTemplateSpecializationKind();
+          = cast<CXXRecordDecl>(R)->getTemplateSpecializationKind();
         if (TSK == TSK_ExplicitInstantiationDeclaration)
           IsExplicitInstantiationDeclaration = true;
         else if (TSK == TSK_ExplicitInstantiationDefinition) {