Switch SearchTabHelper to use WebContentsUserData.

chrome/browser/ui/search/search_model.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/ui/search/search_model.h"
 
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/search/search.h"
 #include "chrome/browser/ui/search/search_model_observer.h"
-#include "chrome/browser/ui/tab_contents/tab_contents.h"
+#include "content/public/browser/web_contents.h"
 
 namespace chrome {
 namespace search {
 
-SearchModel::SearchModel(TabContents* contents)
-    : contents_(contents) {
+SearchModel::SearchModel(content::WebContents* web_contents)
+    : web_contents_(web_contents) {
 }
 
 SearchModel::~SearchModel() {
 }
 
 void SearchModel::SetMode(const Mode& new_mode) {
-  if (!contents_)
+  if (!web_contents_)
     return;
 
-  DCHECK(IsInstantExtendedAPIEnabled(contents_->profile()))
+  Profile* profile =
+      Profile::FromBrowserContext(web_contents_->GetBrowserContext());
+  DCHECK(IsInstantExtendedAPIEnabled(profile))
       << "Please do not try to set the SearchModel mode without first "
       << "checking if Search is enabled.";
 
   if (mode_ == new_mode)
     return;
 
   const Mode old_mode = mode_;
   mode_ = new_mode;
 
   FOR_EACH_OBSERVER(SearchModelObserver, observers_,
                     ModeChanged(old_mode, mode_));
 
   // Animation is transient, it is cleared after observers are notified.
   mode_.animate = false;
 }
 
 void SearchModel::AddObserver(SearchModelObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void SearchModel::RemoveObserver(SearchModelObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 } //  namespace search
 } //  namespace chrome