Implement PaintWorkletGlobalScope#registerPaint() for the CSS Paint API

third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.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/worklet/WorkletGlobalScope.h"
 
 #include "bindings/core/v8/WorkerOrWorkletScriptController.h"
 #include "core/frame/FrameConsole.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/MainThreadDebugger.h"
 #include "modules/worklet/WorkletConsole.h"
 
 namespace blink {
 
 WorkletGlobalScope::WorkletGlobalScope(LocalFrame* frame, const KURL& url, const String& userAgent, PassRefPtr<SecurityOrigin> securityOrigin, v8::Isolate* isolate)
     : MainThreadWorkletGlobalScope(frame)
     , m_url(url)
     , m_userAgent(userAgent)
     , m_scriptController(WorkerOrWorkletScriptController::create(this, isolate))
 {
     setSecurityOrigin(securityOrigin);
 }
 
 WorkletGlobalScope::~WorkletGlobalScope()
 {
 }
 
+void WorkletGlobalScope::dispose()
+{
+    stopActiveDOMObjects();
+
+    ASSERT(m_scriptController);
+    m_scriptController->willScheduleExecutionTermination();
+    m_scriptController->dispose();
+    m_scriptController.clear();
+}
+
 WorkletConsole* WorkletGlobalScope::console()
 {
     if (!m_console)
         m_console = WorkletConsole::create(this);
     return m_console.get();
 }
 
 v8::Local<v8::Object> WorkletGlobalScope::wrap(v8::Isolate*, v8::Local<v8::Object> creationContext)
 {
     // WorkletGlobalScope must never be wrapped with wrap method. The global
@@ skipping 57 matching lines @@
 DEFINE_TRACE(WorkletGlobalScope)
 {
     visitor->trace(m_scriptController);
     visitor->trace(m_console);
     ExecutionContext::trace(visitor);
     SecurityContext::trace(visitor);
     MainThreadWorkletGlobalScope::trace(visitor);
 }
 
 } // namespace blink