[DevTools] paint worklet should report context destroyed

third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/csspaint/PaintWorkletGlobalScope.h"
 
 #include "bindings/core/v8/V8BindingMacros.h"
 #include "bindings/core/v8/WorkerOrWorkletScriptController.h"
 #include "core/CSSPropertyNames.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 29 matching lines @@
     v8::Isolate* isolate)
     : MainThreadWorkletGlobalScope(frame,
                                    url,
                                    userAgent,
                                    std::move(securityOrigin),
                                    isolate) {}
 
 PaintWorkletGlobalScope::~PaintWorkletGlobalScope() {}
 
 void PaintWorkletGlobalScope::dispose() {
+  MainThreadDebugger::instance()->contextWillBeDestroyed(
+      scriptController()->getScriptState());
   // Explicitly clear the paint defininitions to break a reference cycle
   // between them and this global scope.
   m_paintDefinitions.clear();
 
   WorkletGlobalScope::dispose();
 }
 
 void PaintWorkletGlobalScope::registerPaint(const String& name,
                                             const ScriptValue& ctorValue,
                                             ExceptionState& exceptionState) {
@@ skipping 124 matching lines @@
   set->add(generator);
 }
 
 DEFINE_TRACE(PaintWorkletGlobalScope) {
   visitor->trace(m_paintDefinitions);
   visitor->trace(m_pendingGenerators);
   MainThreadWorkletGlobalScope::trace(visitor);
 }
 
 }  // namespace blink