Implement rewind: drop one or more frames from the debugger.

runtime/vm/exceptions.h

 // Copyright (c) 2011, 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 RUNTIME_VM_EXCEPTIONS_H_
 #define RUNTIME_VM_EXCEPTIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/token_position.h"
 
@@ skipping 65 matching lines @@
                               intptr_t expected_to);
   static void ThrowCompileTimeError(const LanguageError& error);
 
   // Returns a RawInstance if the exception is successfully created,
   // otherwise returns a RawError.
   static RawObject* Create(ExceptionType type, const Array& arguments);
 
   static void JumpToFrame(Thread* thread,
                           uword program_counter,
                           uword stack_pointer,
-                          uword frame_pointer);
+                          uword frame_pointer,
+                          bool clear_deopt_at_target);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Exceptions);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_EXCEPTIONS_H_