Remove more unnecessary ChromeURLRequestContext members.

chrome/browser/ui/webui/chrome_url_data_manager.h

 // 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 CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_
 #pragma once
 
 #include <string>
 
+#include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/task.h"
 #include "content/browser/browser_thread.h"
 
 class ChromeURLDataManagerBackend;
 class FilePath;
 class MessageLoop;
 class Profile;
 class RefCountedMemory;
 
@@ skipping 112 matching lines @@
     // This field is set and maintained by ChromeURLDataManagerBackend. It is
     // set when the DataSource is added, and unset if the DataSource is removed.
     // A DataSource can be removed in two ways: the ChromeURLDataManagerBackend
     // is deleted, or another DataSource is registered with the same
     // name. backend_ should only be accessed on the IO thread.
     // This reference can't be via a scoped_refptr else there would be a cycle
     // between the backend and data source.
     ChromeURLDataManagerBackend* backend_;
   };
 
-  explicit ChromeURLDataManager(Profile* profile);
+  explicit ChromeURLDataManager(
+      const base::Callback<ChromeURLDataManagerBackend*(void)>& backend);
   ~ChromeURLDataManager();
 
   // Adds a DataSource to the collection of data sources. This *must* be invoked
   // on the UI thread.
   //
   // If |AddDataSource| is called more than once for a particular name it will
   // release the old |DataSource|, most likely resulting in it getting deleted
   // as there are no other references to it. |DataSource| uses the
   // |DeleteOnUIThread| trait to insure that the destructor is called on the UI
   // thread. This is necessary as some |DataSource|s notably |FileIconSource|
@@ skipping 10 matching lines @@
 
   // If invoked on the UI thread the DataSource is deleted immediatlye,
   // otherwise it is added to |data_sources_| and a task is scheduled to handle
   // deletion on the UI thread. See note abouve DeleteDataSource for more info.
   static void DeleteDataSource(const DataSource* data_source);
 
   // Returns true if |data_source| is scheduled for deletion (|DeleteDataSource|
   // was invoked).
   static bool IsScheduledForDeletion(const DataSource* data_source);
 
-  Profile* profile_;
+  // A callback that returns the ChromeURLDataManagerBackend. Only accessible on
+  // the IO thread. This is necessary because ChromeURLDataManager is created on
+  // the UI thread, but ChromeURLDataManagerBackend lives on the IO thread.
+  const base::Callback<ChromeURLDataManagerBackend*(void)> backend_;
 
   // Lock used when accessing |data_sources_|.
   static base::Lock delete_lock_;
 
   // |data_sources_| that are no longer referenced and scheduled for deletion.
   static DataSources* data_sources_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeURLDataManager);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROME_URL_DATA_MANAGER_H_