Remember deopt-id -> context-level mappings in var descriptors.

runtime/vm/debugger.h

 // 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 RUNTIME_VM_DEBUGGER_H_
 #define RUNTIME_VM_DEBUGGER_H_
 
 #include "include/dart_tools_api.h"
 
 #include "vm/object.h"
@@ skipping 332 matching lines @@
   bool HandlesException(const Instance& exc_obj);
 
  private:
   void PrintToJSONObjectRegular(JSONObject* jsobj, bool full);
   void PrintToJSONObjectAsyncCausal(JSONObject* jsobj, bool full);
   void PrintToJSONObjectAsyncSuspensionMarker(JSONObject* jsobj, bool full);
   void PrintToJSONObjectAsyncActivation(JSONObject* jsobj, bool full);
   void PrintContextMismatchError(intptr_t ctx_slot,
                                  intptr_t frame_ctx_level,
                                  intptr_t var_ctx_level);
+  void PrintDescriptorsError(const char* message);
 
   intptr_t TryIndex();
+  intptr_t DeoptId();
   void GetPcDescriptors();
   void GetVarDescriptors();
   void GetDescIndices();
 
   RawObject* GetAsyncContextVariable(const String& name);
   RawObject* GetAsyncStreamControllerStreamAwaiter(const Object& stream);
   RawObject* GetAsyncStreamControllerStream();
   RawObject* GetAsyncCompleterAwaiter(const Object& completer);
   RawObject* GetAsyncCompleter();
   void ExtractTokenPositionFromAsyncClosure();
@@ skipping 24 matching lines @@
   uword sp_;
 
   // The anchor of the context chain for this function.
   Context& ctx_;
   Code& code_;
   Function& function_;
   bool live_frame_;  // Is this frame a live frame?
   bool token_pos_initialized_;
   TokenPosition token_pos_;
   intptr_t try_index_;
+  intptr_t deopt_id_;
 
   intptr_t line_number_;
   intptr_t column_number_;
   intptr_t context_level_;
 
   // Some frames are deoptimized into a side array in order to inspect them.
   const Array& deopt_frame_;
   const intptr_t deopt_frame_offset_;
 
   Kind kind_;
@@ skipping 383 matching lines @@
 
   friend class Isolate;
   friend class BreakpointLocation;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_DEBUGGER_H_