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

chrome/browser/ui/search/instant_page.cc

 // Copyright 2013 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_page.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/search/search_model.h"
 #include "chrome/browser/ui/search/search_tab_helper.h"
@@ skipping 25 matching lines @@
 
 const std::string& InstantPage::instant_url() const {
   return instant_url_;
 }
 
 bool InstantPage::IsLocal() const {
   return web_contents() &&
       web_contents()->GetURL() == GURL(chrome::kChromeSearchLocalNtpUrl);
 }
 
-InstantPage::InstantPage(Delegate* delegate, const std::string& instant_url,
-                         Profile* profile, bool is_incognito)
+InstantPage::InstantPage(Delegate* delegate,
+                         const std::string& instant_url,
+                         Profile* profile)
     : profile_(profile),
       delegate_(delegate),
-      instant_url_(instant_url),
-      is_incognito_(is_incognito) {
+      instant_url_(instant_url) {
 }
 
 void InstantPage::SetContents(content::WebContents* new_web_contents) {
   ClearContents();
 
   if (!new_web_contents)
     return;
 
   Observe(new_web_contents);
   SearchModel* model =
@@ skipping 33 matching lines @@
 }
 
 void InstantPage::ClearContents() {
   if (web_contents()) {
     SearchTabHelper::FromWebContents(web_contents())->model()->RemoveObserver(
         this);
   }
 
   Observe(NULL);
 }