Move assert.h/assert.cc from runtime/vm to runtime/platform

runtime/vm/flags.h

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLAGS_H_
 #define VM_FLAGS_H_
 
-#include "vm/assert.h"
+#include "platform/assert.h"
 #include "vm/globals.h"
 
 typedef const char* charp;
 
 #define DECLARE_FLAG(type, name)                                               \
   extern type FLAG_##name
 
 #define DEFINE_FLAG(type, name, default_value, comment)                        \
   type FLAG_##name = Flags::Register_##type(&FLAG_##name,                      \
                                             #name,                             \
@@ skipping 48 matching lines @@
   // Testing needs direct access to private methods.
   friend void Dart_TestParseFlags();
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Flags);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLAGS_H_