DevTools: do not enable debugger for pages where script execution is prohibited

Source/core/inspector/InspectorDebuggerAgent.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010-2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 179 matching lines @@
     };
     void addAsyncCallTrackingListener(AsyncCallTrackingListener*);
     void removeAsyncCallTrackingListener(AsyncCallTrackingListener*);
 
     // PromiseTracker::Listener
     void didUpdatePromise(InspectorFrontend::Debugger::EventType::Enum, PassRefPtr<TypeBuilder::Debugger::PromiseDetails>) final;
 
 protected:
     explicit InspectorDebuggerAgent(InjectedScriptManager*);
 
-    virtual void startListeningScriptDebugServer() = 0;
+    virtual bool startListeningScriptDebugServer() = 0;
     virtual void stopListeningScriptDebugServer() = 0;
     virtual void muteConsole() = 0;
     virtual void unmuteConsole() = 0;
     InjectedScriptManager* injectedScriptManager() { return m_injectedScriptManager; }
     virtual InjectedScript injectedScriptForEval(ErrorString*, const int* executionContextId) = 0;
 
-    virtual void enable();
+    virtual bool enable();
     virtual void disable();
     SkipPauseRequest didPause(ScriptState*, const ScriptValue& callFrames, const ScriptValue& exception, const Vector<String>& hitBreakpoints, bool isPromiseRejection) final;
     void didContinue() final;
     void reset();
     void resetModifiedSources();
 
 private:
     bool checkEnabled(ErrorString*);
 
     SkipPauseRequest shouldSkipExceptionPause();
@@ skipping 87 matching lines @@
     int m_currentAsyncOperationId;
     bool m_pendingTraceAsyncOperationCompleted;
     bool m_startingStepIntoAsync;
     WillBeHeapVector<RawPtrWillBeMember<AsyncCallTrackingListener>> m_asyncCallTrackingListeners;
 };
 
 } // namespace blink
 
 
 #endif // InspectorDebuggerAgent_h