Make DOMStorageDispatcherHost be a message filter (and rename it accordingly)...

chrome/browser/in_process_webkit/dom_storage_dispatcher_host.h

-// Copyright (c) 2010 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 CHROME_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_DISPATCHER_HOST_H_
-#define CHROME_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_DISPATCHER_HOST_H_
-#pragma once
-
-#include "base/process.h"
-#include "base/ref_counted.h"
-#include "base/tracked.h"
-#include "chrome/browser/in_process_webkit/dom_storage_area.h"
-#include "chrome/browser/in_process_webkit/webkit_context.h"
-#include "chrome/common/dom_storage_common.h"
-#include "ipc/ipc_message.h"
-
-class DOMStorageContext;
-class GURL;
-class HostContentSettingsMap;
-class ResourceMessageFilter;
-class Task;
-struct ViewMsg_DOMStorageEvent_Params;
-
-// This class handles the logistics of DOM Storage within the browser process.
-// It mostly ferries information between IPCs and the WebKit implementations,
-// but it also handles some special cases like when renderer processes die.
-class DOMStorageDispatcherHost
-    : public base::RefCountedThreadSafe<DOMStorageDispatcherHost> {
- public:
-  // Only call the constructor from the UI thread.
-  DOMStorageDispatcherHost(
-      ResourceMessageFilter* resource_message_filter,
-      WebKitContext* webkit_context);
-
-  // Only call from ResourceMessageFilter on the IO thread.
-  void Init(int process_id, base::ProcessHandle process_handle);
-
-  // Only call from ResourceMessageFilter on the IO thread.  Calls self on the
-  // WebKit thread in some cases.
-  void Shutdown();
-
-  // Only call from ResourceMessageFilter on the IO thread.
-  bool OnMessageReceived(const IPC::Message& message, bool* msg_is_ok);
-
-  // Clones a session storage namespace and returns the cloned namespaces' id.
-  // Only call on the IO thread.
-  int64 CloneSessionStorage(int64 original_id);
-
-  // Send a message to the renderer process associated with our
-  // message_sender_ via the IO thread.  May be called from any thread.
-  void Send(IPC::Message* message);
-
-  // Only call on the WebKit thread.
-  static void DispatchStorageEvent(const NullableString16& key,
-      const NullableString16& old_value, const NullableString16& new_value,
-      const string16& origin, const GURL& url, bool is_local_storage);
-
- private:
-  friend class base::RefCountedThreadSafe<DOMStorageDispatcherHost>;
-  ~DOMStorageDispatcherHost();
-
-  // Message Handlers.
-  void OnStorageAreaId(int64 namespace_id, const string16& origin,
-                       IPC::Message* reply_msg);
-  void OnLength(int64 storage_area_id, IPC::Message* reply_msg);
-  void OnKey(int64 storage_area_id, unsigned index, IPC::Message* reply_msg);
-  void OnGetItem(int64 storage_area_id, const string16& key,
-                 IPC::Message* reply_msg);
-  void OnSetItem(int64 storage_area_id, const string16& key,
-                 const string16& value, const GURL& url,
-                 IPC::Message* reply_msg);
-  void OnRemoveItem(int64 storage_area_id, const string16& key,
-                    const GURL& url, IPC::Message* reply_msg);
-  void OnClear(int64 storage_area_id, const GURL& url, IPC::Message* reply_msg);
-
-  // WebKit thread half of OnStorageAreaId
-  void OnStorageAreaIdWebKit(
-      int64 namespace_id, const string16& origin, IPC::Message* reply_msg,
-      HostContentSettingsMap* host_context_settings_map);
-
-  // Only call on the IO thread.
-  void OnStorageEvent(const ViewMsg_DOMStorageEvent_Params& params);
-
-  // A shortcut for accessing our context.
-  DOMStorageContext* Context() {
-    return webkit_context_->dom_storage_context();
-  }
-
-  // Use whenever there's a chance OnStorageEvent will be called.
-  class ScopedStorageEventContext {
-   public:
-    ScopedStorageEventContext(DOMStorageDispatcherHost* dispatcher_host,
-                              const GURL* url);
-    ~ScopedStorageEventContext();
-  };
-
-  // Only access on the WebKit thread!  Used for storage events.
-  static DOMStorageDispatcherHost* storage_event_host_;
-  static const GURL* storage_event_url_;
-
-  // Data shared between renderer processes with the same profile.
-  scoped_refptr<WebKitContext> webkit_context_;
-
-  // Only set and use on the IO thread.
-  ResourceMessageFilter* resource_message_filter_;
-
-  // If we get a corrupt message from a renderer, we need to kill it using this
-  // handle.
-  base::ProcessHandle process_handle_;
-
-  // Used to dispatch messages to the correct view host.
-  int process_id_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageDispatcherHost);
-};
-
-#endif  // CHROME_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_DISPATCHER_HOST_H_