Add step OverAwait to service protocol

runtime/vm/service_event.h

 // Copyright (c) 2015, 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 VM_SERVICE_EVENT_H_
 #define VM_SERVICE_EVENT_H_
 
 #include "vm/debugger.h"
 
 class DebuggerEvent;
@@ skipping 116 matching lines @@
   }
 
   const Object* exception() const {
     return exception_;
   }
   void set_exception(const Object* exception) {
     ASSERT(kind_ == kPauseException);
     exception_ = exception;
   }
 
-  const Object* async_continuation() const {
-    return async_continuation_;
-  }
-  void set_async_continuation(const Object* closure) {
-    ASSERT(kind_ == kPauseBreakpoint);
-    async_continuation_ = closure;
-  }
-
   bool at_async_jump() const {
     return at_async_jump_;
   }
   void set_at_async_jump(bool value) {
     at_async_jump_ = value;
   }
 
   const Object* inspectee() const {
     return inspectee_;
   }
@@ skipping 41 matching lines @@
 
  private:
   Isolate* isolate_;
   EventKind kind_;
   const char* embedder_kind_;
   const char* embedder_stream_id_;
   Breakpoint* breakpoint_;
   ActivationFrame* top_frame_;
   const String* extension_rpc_;
   const Object* exception_;
-  const Object* async_continuation_;
   bool at_async_jump_;
   const Object* inspectee_;
   const Heap::GCStats* gc_stats_;
   const uint8_t* bytes_;
   intptr_t bytes_length_;
   LogRecord log_record_;
   ExtensionEvent extension_event_;
   int64_t timestamp_;
 };
 
 }  // namespace dart
 
 #endif  // VM_SERVICE_EVENT_H_