Fix a variety of service protocol bugs.

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 VM_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_tools_api.h"
 
 #include "vm/object.h"
@@ skipping 554 matching lines @@
   void SignalIsolateEvent(DebuggerEvent::EventType type);
   static void SignalIsolateInterrupted();
 
   uword GetPatchedStubAddress(uword breakpoint_address);
 
   void PrintBreakpointsToJSONArray(JSONArray* jsarr) const;
   void PrintSettingsToJSONObject(JSONObject* jsobj) const;
 
   static bool IsDebuggable(const Function& func);
 
+  intptr_t limitBreakpointId() { return next_id_; }
+
  private:
   enum ResumeAction {
     kContinue,
     kStepOver,
     kStepOut,
     kSingleStep
   };
 
   static bool HasEventHandler();
   void InvokeEventHandler(DebuggerEvent* event);
@@ skipping 105 matching lines @@
 
   friend class Isolate;
   friend class BreakpointLocation;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_