Change SkStream.

src/ports/SkOSFile_none.cpp

Index: src/ports/SkOSFile_none.cpp
===================================================================
--- src/ports/SkOSFile_none.cpp	(revision 0)
+++ src/ports/SkOSFile_none.cpp	(working copy)
@@ -0,0 +1,18 @@
+/*
+ * 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_fidentical(SkFILE* a, SkFILE* b) {
+    return false;
+}
+
+void sk_fmunmap(const void* addr, size_t length) { }
+
+void* sk_fmmap(SkFILE* f, size_t* size) {
+    return NULL;
+}