Revert of Make nanobench and dm be usable from Chromium build

dm/dm_main.cpp

Index: dm/dm_main.cpp
diff --git a/dm/dm_main.cpp b/dm/dm_main.cpp
deleted file mode 100644
index ac8e0f3ce0db80c5cb153003028f461879dcaa72..0000000000000000000000000000000000000000
--- a/dm/dm_main.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "CrashHandler.h"
-#include "SkCommandLineFlags.h"
-#include "dm.h"
-
-int main(int argc, char * const argv[]) {
-    SetupCrashHandler();
-    SkCommandLineFlags::Parse(argc, const_cast<char**>(argv));
-    return dm_main();
-}