Move SkOSFile::Iter impls into ports.

src/ports/SkOSFile_none.cpp

Index: src/ports/SkOSFile_none.cpp
diff --git a/src/ports/SkOSFile_none.cpp b/src/ports/SkOSFile_none.cpp
deleted file mode 100644
index 11723c24f3114b44adc25edd87c77c10fe29aa4a..0000000000000000000000000000000000000000
--- a/src/ports/SkOSFile_none.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkOSFile.h"
-
-bool sk_exists(const char *path, SkFILE_Flags flags) {
-    return false;
-}
-
-bool sk_fidentical(SkFILE* a, SkFILE* b) {
-    return false;
-}
-
-int sk_fileno(SkFILE* f) {
-    return -1;
-}
-
-void sk_fmunmap(const void* addr, size_t length) { }
-
-void* sk_fdmmap(int fd, size_t* size) {
-    return NULL;
-}
-
-void* sk_fmmap(SkFILE* f, size_t* size) {
-    return NULL;
-}