Introduce WorkletGlobalScopeProxy interface.

third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp

Index: third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp b/third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp
index c640a4a6ae139af996329f988f9855e07a5d1b48..fe334e4e4af969a9b878893550ef64be79d88e3f 100644
--- a/third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerInspectorProxy.cpp
@@ -128,7 +128,7 @@ void WorkerInspectorProxy::addConsoleMessageFromWorker(ConsoleMessage* consoleMe
 
 static void connectToWorkerGlobalScopeInspectorTask(WorkerThread* workerThread)
 {
-    if (WorkerInspectorController* inspector = workerThread->workerGlobalScope()->workerInspectorController())
+    if (WorkerInspectorController* inspector = toWorkerGlobalScope(workerThread->globalScope())->workerInspectorController())
         inspector->connectFrontend();
 }
 
@@ -143,7 +143,7 @@ void WorkerInspectorProxy::connectToInspector(WorkerInspectorProxy::PageInspecto
 
 static void disconnectFromWorkerGlobalScopeInspectorTask(WorkerThread* workerThread)
 {
-    if (WorkerInspectorController* inspector = workerThread->workerGlobalScope()->workerInspectorController())
+    if (WorkerInspectorController* inspector = toWorkerGlobalScope(workerThread->globalScope())->workerInspectorController())
         inspector->disconnectFrontend();
 }
 
@@ -157,7 +157,7 @@ void WorkerInspectorProxy::disconnectFromInspector(WorkerInspectorProxy::PageIns
 
 static void dispatchOnInspectorBackendTask(const String& message, WorkerThread* workerThread)
 {
-    if (WorkerInspectorController* inspector = workerThread->workerGlobalScope()->workerInspectorController())
+    if (WorkerInspectorController* inspector = toWorkerGlobalScope(workerThread->globalScope())->workerInspectorController())
         inspector->dispatchMessageFromFrontend(message);
 }