Implement PaintWorkletGlobalScope#registerPaint() for the CSS Paint API

third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp

Index: third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp
diff --git a/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp b/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp
index f0f67108d4161878b755a92e87ce2516cfa840fe..af3f14b34648884b50cdfb7a82e27e04d0ae6e8c 100644
--- a/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp
+++ b/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.cpp
@@ -25,6 +25,16 @@ WorkletGlobalScope::~WorkletGlobalScope()
 {
 }
 
+void WorkletGlobalScope::dispose()
+{
+    stopActiveDOMObjects();
+
+    ASSERT(m_scriptController);
+    m_scriptController->willScheduleExecutionTermination();
+    m_scriptController->dispose();
+    m_scriptController.clear();
+}
+
 WorkletConsole* WorkletGlobalScope::console()
 {
     if (!m_console)