Add mips skeleton sources.

runtime/vm/code_patcher_mips.cc

Index: runtime/vm/code_patcher_mips.cc
===================================================================
--- runtime/vm/code_patcher_mips.cc	(revision 0)
+++ runtime/vm/code_patcher_mips.cc	(revision 0)
@@ -0,0 +1,54 @@
+// 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 "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
+#if defined(TARGET_ARCH_MIPS)
+
+#include "vm/code_patcher.h"
+
+namespace dart {
+
+uword CodePatcher::GetStaticCallTargetAt(uword return_address) {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+
+void CodePatcher::PatchStaticCallAt(uword return_address, uword new_target) {
+  UNIMPLEMENTED();
+}
+
+
+void CodePatcher::PatchInstanceCallAt(uword return_address, uword new_target) {
+  UNIMPLEMENTED();
+}
+
+
+void CodePatcher::InsertCallAt(uword start, uword target) {
+  UNIMPLEMENTED();
+}
+
+
+bool CodePatcher::IsDartCall(uword return_address) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+uword CodePatcher::GetInstanceCallAt(uword return_address,
+                                     ICData* ic_data,
+                                     Array* arguments_descriptor) {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+
+intptr_t CodePatcher::InstanceCallSizeInBytes() {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_MIPS