[sessions] Properly namespace recently-componentized TabRestore code

components/sessions/core/tab_restore_service_client.h

 // Copyright 2015 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 COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_
 #define COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "components/sessions/session_id.h"
 #include "components/sessions/sessions_export.h"
 
 namespace base {
 class CancelableTaskTracker;
 class SequencedWorkerPool;
 }
 
-// TODO(blundell): Remove all references to WebContents from
-// TabRestoreServiceClient and get rid of this. crbug.com/530174
-namespace content {
-class WebContents;
-}
-
 class GURL;
-class TabRestoreServiceDelegate;
 
 namespace sessions {
 
 class LiveTab;
 struct SessionWindow;
+class TabRestoreServiceDelegate;
 
 // Callback from TabRestoreServiceClient::GetLastSession.
 // The second parameter is the id of the window that was last active.
 typedef base::Callback<void(ScopedVector<SessionWindow>, SessionID::id_type)>
     GetLastSessionCallback;
 
 // A class that is used to associate embedder-specific data with
 // TabRestoreService::Tab. See TabRestoreServiceClient::GetClientData().
 // Subclasses of this class must be copyable by implementing the Clone() method
 // for usage by the Tab struct, which is itself copyable and assignable.
@@ skipping 31 matching lines @@
   // Note that |host_desktop_type| is opaque to the component; the only values
   // that will be passed here are those that have been passed *in* to the
   // component from the embedder via TabRestoreService.
   virtual TabRestoreServiceDelegate* FindTabRestoreServiceDelegateWithID(
       SessionID::id_type desired_id,
       int host_desktop_type) = 0;
 
   // Returns whether a given URL should be tracked for restoring.
   virtual bool ShouldTrackURLForRestore(const GURL& url) = 0;
 
-  // Returns the extension app ID for the given WebContents, or the empty string
+  // Returns the extension app ID for the given LiveTab, or the empty string
   // if there is no such ID (e.g., if extensions are not supported by the
   // embedder).
   virtual std::string GetExtensionAppIDForTab(LiveTab* tab) = 0;
 
   // Returns any client data that should be associated with the
   // TabRestoreService::Tab corresponding to |tab|. That tab will own
   // this TabClientData instance. The default implementation returns null.
   virtual scoped_ptr<TabClientData> GetTabClientDataForTab(LiveTab* tab);
 
   // Get the sequenced worker pool for running tasks on the backend thread as
@@ skipping 16 matching lines @@
                               base::CancelableTaskTracker* tracker) = 0;
 
   // Called when a tab is restored. |url| is the URL that the tab is currently
   // visiting.
   virtual void OnTabRestored(const GURL& url);
 };
 
 }  // namespace sessions
 
 #endif  // COMPONENTS_SESSIONS_CORE_TAB_RESTORE_SERVICE_CLIENT_H_