Rename SourceManager::createFileIDForMemBuffer()

It makes more sense to just overload createFileID().

Gardening only.

llvm-svn: 209002
diff --git a/clang/unittests/AST/CommentLexer.cpp b/clang/unittests/AST/CommentLexer.cpp
index fc0fd77..cb8de27 100644
--- a/clang/unittests/AST/CommentLexer.cpp
+++ b/clang/unittests/AST/CommentLexer.cpp
@@ -61,7 +61,7 @@
 void CommentLexerTest::lexString(const char *Source,
                                  std::vector<Token> &Toks) {
   MemoryBuffer *Buf = MemoryBuffer::getMemBuffer(Source);
-  FileID File = SourceMgr.createFileIDForMemBuffer(Buf);
+  FileID File = SourceMgr.createFileID(Buf);
   SourceLocation Begin = SourceMgr.getLocForStartOfFile(File);
 
   Lexer L(Allocator, Diags, Traits, Begin, Source, Source + strlen(Source));