Introduce WorkletGlobalScopeProxy interface.

third_party/WebKit/Source/modules/worklet/ThreadedWorkletGlobalScopeProxy.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/ThreadedWorkletGlobalScopeProxy.h"
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/WorkerOrWorkletScriptController.h"
+#include "core/dom/CrossThreadTask.h"
+#include "core/dom/ExecutionContext.h"
+#include "core/workers/WorkletGlobalScope.h"
+#include "public/platform/WebTraceLocation.h"
+
+namespace blink {
+
+namespace {
+
+void processEvaluateScript(const String& source, const KURL& scriptURL, ExecutionContext* executionContext)
+{
+    WorkletGlobalScope* globalScope = toWorkletGlobalScope(executionContext);
+    globalScope->scriptController()->evaluate(ScriptSourceCode(source, scriptURL));
+}
+
+} // namespace
+
+ThreadedWorkletGlobalScopeProxy::ThreadedWorkletGlobalScopeProxy(PassOwnPtr<WorkletThread> workletThread)
+    : m_workletThread(std::move(workletThread))
+{
+}
+
+ThreadedWorkletGlobalScopeProxy::~ThreadedWorkletGlobalScopeProxy()
+{
+}
+
+void ThreadedWorkletGlobalScopeProxy::evaluateScript(const String& source, const KURL& scriptURL)
+{
+    DCHECK(isMainThread());
+    m_workletThread->postTask(BLINK_FROM_HERE, createCrossThreadTask(&processEvaluateScript, source, scriptURL));
+}
+
+void ThreadedWorkletGlobalScopeProxy::terminateWorkletGlobalScope()
+{
+    DCHECK(isMainThread());
+
+    // TODO write termination dance.
+}
+
+} // namespace blink