WorkerLoaderProxy: stop accessing cross-thread execution context

third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp

Index: third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp b/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
index 47e1ed2dff6304748a02fadadb66196a4f644d33..6b25a1db25583062bc4a1ef1de6bc7f66153d2d8 100644
--- a/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSharedWorkerImpl.cpp
@@ -31,7 +31,6 @@
 #include "web/WebSharedWorkerImpl.h"
 
 #include "core/dom/Document.h"
-#include "core/dom/ExecutionContextTask.h"
 #include "core/events/MessageEvent.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/inspector/ConsoleMessage.h"
@@ -303,13 +302,9 @@ void WebSharedWorkerImpl::didTerminateWorkerThreadOnMainThread() {
 
 void WebSharedWorkerImpl::postTaskToLoader(
     const WebTraceLocation& location,
-    std::unique_ptr<ExecutionContextTask> task) {
+    std::unique_ptr<WTF::CrossThreadClosure> task) {
   m_parentFrameTaskRunners->get(TaskType::Networking)
-      ->postTask(FROM_HERE,
-                 crossThreadBind(
-                     &ExecutionContextTask::performTaskIfContextIsValid,
-                     WTF::passed(std::move(task)),
-                     wrapCrossThreadWeakPersistent(m_loadingDocument.get())));
+      ->postTask(FROM_HERE, std::move(task));
 }
 
 void WebSharedWorkerImpl::postTaskToWorkerGlobalScope(
@@ -318,6 +313,10 @@ void WebSharedWorkerImpl::postTaskToWorkerGlobalScope(
   m_workerThread->postTask(location, std::move(task));
 }
 
+ExecutionContext* WebSharedWorkerImpl::getLoaderExecutionContext() {
+  return m_loadingDocument.get();
+}
+
 void WebSharedWorkerImpl::connect(WebMessagePortChannel* webChannel) {
   DCHECK(isMainThread());
   workerThread()->postTask(