DevTools: add initial support for shared workers debugging

content/browser/debugger/worker_devtools_message_filter.h

Index: content/browser/debugger/worker_devtools_message_filter.h
diff --git a/content/browser/debugger/worker_devtools_message_filter.h b/content/browser/debugger/worker_devtools_message_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..535378230cc2360856e1b516894e276286b817c4
--- /dev/null
+++ b/content/browser/debugger/worker_devtools_message_filter.h
@@ -0,0 +1,31 @@
+// Copyright (c) 2011 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 CONTENT_BROWSER_DEBUGGER_WORKER_DEVTOOLS_MESSAGE_FILTER_H_
+#define CONTENT_BROWSER_DEBUGGER_WORKER_DEVTOOLS_MESSAGE_FILTER_H_
+#pragma once
+
+#include "base/callback.h"
+#include "content/browser/browser_message_filter.h"
+
+class WorkerDevToolsMessageFilter : public BrowserMessageFilter {
+ public:
+  explicit WorkerDevToolsMessageFilter(int worker_process_host_id);
+
+ private:
+  virtual ~WorkerDevToolsMessageFilter();
+
+  // BrowserMessageFilter implementation.
+  virtual void OnChannelClosing();
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok);
+  // Message handlers.
+  void OnForwardToClient(const IPC::Message& message);
+
+  int worker_process_host_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(WorkerDevToolsMessageFilter);
+};
+
+#endif  // CONTENT_BROWSER_DEBUGGER_WORKER_DEVTOOLS_MESSAGE_FILTER_H_