Cleanup: Remove unused variables in chrome/ found by Scythe.

chrome/browser/ui/search/instant_tab.cc

 // Copyright 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/ui/search/instant_tab.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/ntp/ntp_user_data_logger.h"
 #include "content/public/browser/web_contents.h"
 
 InstantTab::InstantTab(InstantPage::Delegate* delegate,
                        Profile* profile)
-    : InstantPage(delegate, "", profile, profile->IsOffTheRecord()) {
+    : InstantPage(delegate, "", profile) {
 }
 
 InstantTab::~InstantTab() {
 }
 
 void InstantTab::Init(content::WebContents* contents) {
   SetContents(contents);
 }
 
 // static
 void InstantTab::EmitNtpStatistics(content::WebContents* contents) {
   NTPUserDataLogger::GetOrCreateFromWebContents(contents)->EmitNtpStatistics();
 }
 
 bool InstantTab::ShouldProcessAboutToNavigateMainFrame() {
   return true;
 }