[DevTools] Explicitly reset context group when clearing ScriptController.

third_party/WebKit/Source/core/inspector/MainThreadDebugger.h

 /*
  * Copyright (c) 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 46 matching lines @@
     explicit MainThreadDebugger(v8::Isolate*);
     ~MainThreadDebugger() override;
 
     static MainThreadDebugger* instance();
     static void interruptMainThreadAndRun(std::unique_ptr<InspectorTaskRunner::Task>);
 
     InspectorTaskRunner* taskRunner() const { return m_taskRunner.get(); }
     bool isWorker() override { return false; }
     void setClientMessageLoop(PassOwnPtr<ClientMessageLoop>);
     int contextGroupId(LocalFrame*);
+    void didClearContextsForFrame(LocalFrame*);
     void contextCreated(ScriptState*, LocalFrame*, SecurityOrigin*);
     void contextWillBeDestroyed(ScriptState*);
 
     void installAdditionalCommandLineAPI(v8::Local<v8::Context>, v8::Local<v8::Object>) override;
 
     v8::MaybeLocal<v8::Value> memoryInfo(v8::Isolate*, v8::Local<v8::Context>) override;
 protected:
     void reportMessageToConsole(v8::Local<v8::Context>, ConsoleMessage*) override;
 
 private:
@@ skipping 14 matching lines @@
 
     static void querySelectorCallback(const v8::FunctionCallbackInfo<v8::Value>&);
     static void querySelectorAllCallback(const v8::FunctionCallbackInfo<v8::Value>&);
     static void xpathSelectorCallback(const v8::FunctionCallbackInfo<v8::Value>&);
 };
 
 } // namespace blink
 
 
 #endif // MainThreadDebugger_h