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diff --git a/chromium/content/browser/shared_worker/shared_worker_host.h b/chromium/content/browser/shared_worker/shared_worker_host.h
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+++ b/chromium/content/browser/shared_worker/shared_worker_host.h
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+// 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 CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_HOST_H_
+#define CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_HOST_H_
+
+#include <list>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string16.h"
+#include "base/time/time.h"
+#include "content/browser/shared_worker/shared_worker_message_filter.h"
+#include "content/browser/worker_host/worker_document_set.h"
+
+class GURL;
+
+namespace IPC {
+class Message;
+}
+
+namespace content {
+class SharedWorkerMessageFilter;
+class SharedWorkerInstance;
+
+// The SharedWorkerHost is the interface that represents the browser side of
+// the browser <-> worker communication channel.
+class SharedWorkerHost {
+ public:
+  SharedWorkerHost(SharedWorkerInstance* instance,
+                   SharedWorkerMessageFilter* filter,
+                   int worker_route_id);
+  ~SharedWorkerHost();
+
+  // Sends |message| to the SharedWorker.
+  bool Send(IPC::Message* message);
+
+  // Starts the SharedWorker in the renderer process which is associated with
+  // |filter_|.
+  void Start(bool pause_on_start);
+
+  // Returns true iff the given message from a renderer process was forwarded to
+  // the worker.
+  bool FilterMessage(const IPC::Message& message,
+                     SharedWorkerMessageFilter* filter);
+
+  // Handles the shutdown of the filter. If the worker has no other client,
+  // sends TerminateWorkerContext message to shut it down.
+  void FilterShutdown(SharedWorkerMessageFilter* filter);
+
+  // Shuts down any shared workers that are no longer referenced by active
+  // documents.
+  void DocumentDetached(SharedWorkerMessageFilter* filter,
+                        unsigned long long document_id);
+
+  void WorkerContextClosed();
+  void WorkerScriptLoaded();
+  void WorkerScriptLoadFailed();
+  void WorkerConnected(int message_port_id);
+  void WorkerContextDestroyed();
+  void AllowDatabase(const GURL& url,
+                     const base::string16& name,
+                     const base::string16& display_name,
+                     unsigned long estimated_size,
+                     bool* result);
+  void AllowFileSystem(const GURL& url, bool* result);
+  void AllowIndexedDB(const GURL& url,
+                      const base::string16& name,
+                      bool* result);
+
+  // Terminates the given worker, i.e. based on a UI action.
+  void TerminateWorker();
+
+  void AddFilter(SharedWorkerMessageFilter* filter, int route_id);
+
+  SharedWorkerInstance* instance() { return instance_.get(); }
+  WorkerDocumentSet* worker_document_set() const {
+    return worker_document_set_.get();
+  }
+  SharedWorkerMessageFilter* container_render_filter() const {
+    return container_render_filter_;
+  }
+  int process_id() const { return worker_process_id_; }
+  int worker_route_id() const { return worker_route_id_; }
+  bool load_failed() const { return load_failed_; }
+  bool closed() const { return closed_; }
+
+ private:
+  // Unique identifier for a worker client.
+  class FilterInfo {
+   public:
+    FilterInfo(SharedWorkerMessageFilter* filter, int route_id)
+        : filter_(filter), route_id_(route_id), message_port_id_(0) {}
+    SharedWorkerMessageFilter* filter() const { return filter_; }
+    int route_id() const { return route_id_; }
+    int message_port_id() const { return message_port_id_; }
+    void set_message_port_id(int id) { message_port_id_ = id; }
+
+   private:
+    SharedWorkerMessageFilter* filter_;
+    int route_id_;
+    int message_port_id_;
+  };
+
+  typedef std::list<FilterInfo> FilterList;
+
+  // Relays |message| to the SharedWorker. Takes care of parsing the message if
+  // it contains a message port and sending it a valid route id.
+  void RelayMessage(const IPC::Message& message,
+                    SharedWorkerMessageFilter* incoming_filter);
+
+  // Return a vector of all the render process/render frame IDs.
+  std::vector<std::pair<int, int> > GetRenderFrameIDsForWorker();
+
+  void RemoveFilters(SharedWorkerMessageFilter* filter);
+  bool HasFilter(SharedWorkerMessageFilter* filter, int route_id) const;
+  void SetMessagePortID(SharedWorkerMessageFilter* filter,
+                        int route_id,
+                        int message_port_id);
+
+  scoped_ptr<SharedWorkerInstance> instance_;
+  scoped_refptr<WorkerDocumentSet> worker_document_set_;
+  FilterList filters_;
+  SharedWorkerMessageFilter* container_render_filter_;
+  int worker_process_id_;
+  int worker_route_id_;
+  bool load_failed_;
+  bool closed_;
+  const base::TimeTicks creation_time_;
+  DISALLOW_COPY_AND_ASSIGN(SharedWorkerHost);
+};
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SHARED_WORKER_SHARED_WORKER_HOST_H_