Fix for issues 6080 - pass in the Isolate's top context into the stub for invoking dart code from n…

runtime/vm/stack_frame_mips.cc

 // 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"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/stack_frame.h"
 
 namespace dart {
 
 intptr_t StackFrame::PcAddressOffsetFromSp() {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 uword StackFrame::GetCallerFp() const {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 uword StackFrame::GetCallerSp() const {
   UNIMPLEMENTED();
   return 0;
 }
 
 
-intptr_t EntryFrame::ExitLinkOffset() {
+intptr_t EntryFrame::ExitLinkOffset() const {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+
+intptr_t EntryFrame::SavedContextOffset() const {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 void StackFrameIterator::SetupLastExitFrameData() {
   UNIMPLEMENTED();
 }
 
 
 void StackFrameIterator::SetupNextExitFrameData() {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS