Move Mime type handling to streamsPrivate API, so that it works on Desktop Chrome.

chrome/browser/chromeos/extensions/file_browser_resource_throttle.h

-// Copyright (c) 2012 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_CHROMEOS_EXTENSIONS_FILE_BROWSER_RESOURCE_THROTTLE_H_
-#define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_RESOURCE_THROTTLE_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "content/public/browser/resource_throttle.h"
-#include "googleurl/src/gurl.h"
-
-class ExtensionInfoMap;
-class ExtensionSet;
-
-namespace net {
-class URLRequest;
-}
-
-// Resource throttle that intercepts URL requests that can be handled by an
-// installed, white-listed file browser handler extension.
-// The requests are intercepted before processing the response because the
-// request's MIME type is needed to determine if it can be handled by a file
-// browser handler. It the request can be handled by a file browser handler
-// extension, it gets canceled and the extension is notified to handle
-// the requested URL.
-class FileBrowserResourceThrottle : public content::ResourceThrottle {
- public:
-  // Used to dispatch fileBrowserHandler events to notify an extension it should
-  // handle an URL request.
-  // Can be used on any thread. The actual dispatch tasks will be posted to the
-  // UI thread.
-  class FileBrowserHandlerEventRouter {
-   public:
-    virtual ~FileBrowserHandlerEventRouter() {}
-
-    // Used to dispatch fileBrowserHandler.onExecuteContentHandler to the
-    // extension with id |extension_id|. |mime_type| and |request_url| are the
-    // URL request's parameters that should be handed to the extension.
-    // |render_process_id| and |render_view_id| are used to determine the
-    // profile from which the URL request came and in which the event should be
-    // dispatched.
-    virtual void DispatchMimeTypeHandlerEvent(
-        int render_process_id,
-        int render_view_id,
-        const std::string& mime_type,
-        const GURL& request_url,
-        const std::string& extension_id) = 0;
-  };
-
-  // Creates a FileBrowserResourceThrottle for the |request|.
-  // The throtlle's |mime_type_| and |url_request_| members are extracted from
-  // the request.
-  // The throttle's |event_router_| is created and set (it's a
-  // FileBrowserHandlerEventRouterImpl instance; see the .cc file).
-  static FileBrowserResourceThrottle* Create(
-      int render_process_id,
-      int render_view_id,
-      net::URLRequest* request,
-      bool profile_is_incognito,
-      const ExtensionInfoMap* extension_info_map);
-
-  // Creates a FileBrowserResourceThrottle to be used in a test.
-  // |event_router| can hold NULL, in which case the throttle's |event_router_|
-  // member is set to a FileBrowserHandlerEventRouterImpl instance, just like in
-  // FileBrowserResourceThrottle::Create.
-  static FileBrowserResourceThrottle* CreateForTest(
-      int render_process_id,
-      int renser_view_id,
-      const std::string& mime_type,
-      const GURL& request_url,
-      bool profile_is_incognito,
-      const ExtensionInfoMap* extension_info_map,
-      scoped_ptr<FileBrowserHandlerEventRouter> event_router);
-
-  virtual ~FileBrowserResourceThrottle();
-
-  // content::ResourceThrottle implementation.
-  // Calls |MaybeInterceptWithExtension| for all extension_id's white-listed to
-  // use file browser handler MIME type filters.
-  virtual void WillProcessResponse(bool* defer) OVERRIDE;
-
- private:
-  // Use Create* methods to create a FileBrowserResourceThrottle instance.
-  FileBrowserResourceThrottle(
-      int render_process_id,
-      int render_view_id,
-      const std::string& mime_type,
-      const GURL& request_url,
-      bool profile_is_incognito,
-      const ExtensionInfoMap* extension_info_map,
-      scoped_ptr<FileBrowserHandlerEventRouter> event_router);
-
-  // Checks if the extension has a registered file browser handler that can
-  // handle the request's mime_type. If this is the case, the request is
-  // canceled and fileBrowserHandler.onExtecuteContentHandler event is
-  // dispatched to the extension.
-  // Returns whether the URL request has been intercepted.
-  bool MaybeInterceptWithExtension(const std::string& extension_id);
-
-  // Render process id from which the request came.
-  int render_process_id_;
-  // Render view id from which the request came.
-  int render_view_id_;
-  // The request's MIME type.
-  std::string mime_type_;
-  // The request's URL.
-  GURL request_url_;
-  // Whether the request came from an incognito profile.
-  bool profile_is_incognito_;
-  // Map holding list of installed extensions. Must be used exclusively on IO
-  // thread.
-  const scoped_refptr<const ExtensionInfoMap> extension_info_map_;
-
-  // Event router to be used to dispatch the fileBrowserHandler events.
-  scoped_ptr<FileBrowserHandlerEventRouter> event_router_;
-};
-
-#endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_RESOURCE_THROTTLE_H_