Teach debugger to ignore breakpoints

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 "vm/object.h"
 
 namespace dart {
@@ skipping 244 matching lines @@
 
   Isolate* isolate_;
   bool initialized_;
   BreakpointHandler* bp_handler_;
   SourceBreakpoint* src_breakpoints_;
   CodeBreakpoint* code_breakpoints_;
 
   // Tells debugger what to do when resuming execution after a breakpoint.
   ResumeAction resume_action_;
 
+  // Do not call back to breakpoint handler if this flag is set.
+  // Effectively this means ignoring breakpoints. Set when Dart code may
+  // be run as a side effect of getting values of fields.
+  bool ignore_breakpoints_;
+
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_