Add mips skeleton sources.

runtime/vm/object_mips_test.cc

Index: runtime/vm/object_mips_test.cc
===================================================================
--- runtime/vm/object_mips_test.cc	(revision 0)
+++ runtime/vm/object_mips_test.cc	(revision 0)
@@ -0,0 +1,40 @@
+// Copyright (c) 2013, 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.
+
+#include "platform/assert.h"
+#include "vm/globals.h"
+#if defined(TARGET_ARCH_MIPS)
+
+#include "vm/assembler.h"
+#include "vm/object.h"
+#include "vm/unit_test.h"
+
+namespace dart {
+
+#define __ assembler->
+
+
+// Generate a simple dart code sequence.
+// This is used to test Code and Instruction object creation.
+void GenerateIncrement(Assembler* assembler) {
+  __ Unimplemented("GenerateIncrement");
+}
+
+
+// Generate a dart code sequence that embeds a string object in it.
+// This is used to test Embedded String objects in the instructions.
+void GenerateEmbedStringInCode(Assembler* assembler, const char* str) {
+  __ Unimplemented("GenerateEmbedStringInCode");
+}
+
+
+// Generate a dart code sequence that embeds a smi object in it.
+// This is used to test Embedded Smi objects in the instructions.
+void GenerateEmbedSmiInCode(Assembler* assembler, intptr_t value) {
+  __ Unimplemented("GenerateEmbedSmiInCode");
+}
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_MIPS