Move CancelableTaskTracker to //base/task/CancelableTaskTracker.

chrome/browser/sessions/session_service.cc

 // 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.
 
 #include "chrome/browser/sessions/session_service.h"
 
 #include <algorithm>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 479 matching lines @@
     const SessionID& window_id,
     const SessionID& tab_id,
     const std::string& user_agent_override) {
   if (!ShouldTrackChangesToWindow(window_id))
     return;
 
   ScheduleCommand(CreateSetTabUserAgentOverrideCommand(
       kCommandSetTabUserAgentOverride, tab_id.id(), user_agent_override));
 }
 
-CancelableTaskTracker::TaskId SessionService::GetLastSession(
+base::CancelableTaskTracker::TaskId SessionService::GetLastSession(
     const SessionCallback& callback,
-    CancelableTaskTracker* tracker) {
+    base::CancelableTaskTracker* tracker) {
   // OnGotSessionCommands maps the SessionCommands to browser state, then run
   // the callback.
   return ScheduleGetLastSessionCommands(
       base::Bind(&SessionService::OnGotSessionCommands,
                  base::Unretained(this), callback),
       tracker);
 }
 
 void SessionService::Save() {
   bool had_commands = !pending_commands().empty();
@@ skipping 1263 matching lines @@
     return;
   }
 
   // Check for any open windows for the current profile that we aren't tracking.
   for (chrome::BrowserIterator it; !it.done(); it.Next()) {
     if ((*it)->profile() == profile())
       return;
   }
   DeleteSessionOnlyData(profile());
 }