Rename SkFontHost_none.cpp to SkFontMgr_empty_factory.

src/ports/SkFontHost_none.cpp

Index: src/ports/SkFontHost_none.cpp
diff --git a/src/ports/SkFontHost_none.cpp b/src/ports/SkFontHost_none.cpp
deleted file mode 100644
index f76910d97ff1a9c25edd53ef9d632d9c39e88fd7..0000000000000000000000000000000000000000
--- a/src/ports/SkFontHost_none.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-
-/*
- * Copyright 2008 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkFontMgr.h"
-#include "SkScalerContext.h"
-
-SkFontMgr* SkFontMgr::Factory() {
-    // Always return NULL, an empty SkFontMgr will be used.
-    return NULL;
-}