[inspector] use same schedulePauseOnNextStatement strategy for Debugger.pause

src/inspector/v8-debugger-agent-impl.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_
 #define V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_
 
 #include <vector>
 
 #include "src/base/macros.h"
@@ skipping 180 matching lines @@
 
   using BreakReason =
       std::pair<String16, std::unique_ptr<protocol::DictionaryValue>>;
   std::vector<BreakReason> m_breakReason;
 
   void pushBreakDetails(
       const String16& breakReason,
       std::unique_ptr<protocol::DictionaryValue> breakAuxData);
   void popBreakDetails();
 
-  bool m_javaScriptPauseScheduled;
   bool m_skipAllPauses = false;
 
   std::unique_ptr<V8Regex> m_blackboxPattern;
   protocol::HashMap<String16, std::vector<std::pair<int, int>>>
       m_blackboxedPositions;
 
   std::unique_ptr<ScheduleStepIntoAsyncCallback> m_stepIntoAsyncCallback;
 
   DISALLOW_COPY_AND_ASSIGN(V8DebuggerAgentImpl);
 };
 
 }  // namespace v8_inspector
 
 #endif  // V8_INSPECTOR_V8DEBUGGERAGENTIMPL_H_