Make some helper functions static. NFC.

llvm-svn: 353705
diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index 03d612a..a042abb 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -968,8 +968,8 @@
   }
 }
 
-DeclContext::lookup_result getConstructors(ASTContext &Context,
-                                           const CXXRecordDecl *Record) {
+static DeclContext::lookup_result getConstructors(ASTContext &Context,
+                                                  const CXXRecordDecl *Record) {
   QualType RecordTy = Context.getTypeDeclType(Record);
   DeclarationName ConstructorName =
       Context.DeclarationNames.getCXXConstructorName(