DevTools: Extract WorkerInspectorProxy interface from WorkerGlobalScopeProxy.

Source/core/workers/WorkerInspectorProxy.h

+// Copyright 2014 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.
+
+#ifndef WorkerInspectorProxy_h
+#define WorkerInspectorProxy_h
+
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+// A proxy for talking to the worker inspector on the worker thread.
+// All of these methods should be called on the main thread.
+class WorkerInspectorProxy {
+public:
+    virtual ~WorkerInspectorProxy() { }
+
+    class PageInspector {
+    public:
+        virtual ~PageInspector() { }
+        virtual void dispatchMessageFromWorker(const String&) = 0;
+    };
+
+    virtual void connectToInspector(PageInspector*) = 0;
+    virtual void disconnectFromInspector() = 0;
+    virtual void sendMessageToInspector(const String&) = 0;
+    virtual void writeTimelineStartedEvent(const String& sessionId) = 0;
+};
+
+} // namespace blink
+
+#endif // WorkerInspectorProxy_h