Persist the Instant API to committed search result pages.

chrome/browser/ui/views/frame/instant_preview_controller_views.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/views/frame/instant_preview_controller_views.h"
 
 #include "chrome/browser/instant/instant_model.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/view_ids.h"
 #include "chrome/browser/ui/views/frame/contents_container.h"
 #include "ui/views/controls/webview/webview.h"
 
 InstantPreviewControllerViews::InstantPreviewControllerViews(
     Browser* browser,
     ContentsContainer* contents)
     : InstantPreviewController(browser),
       contents_(contents) {
 }
 
 InstantPreviewControllerViews::~InstantPreviewControllerViews() {
 }
 
 void InstantPreviewControllerViews::PreviewStateChanged(
     const InstantModel& model) {
   if (model.mode().is_ntp() || model.mode().is_search_suggestions()) {
     // Show the preview.
     if (!preview_) {
       preview_.reset(new views::WebView(browser_->profile()));
       preview_->set_id(VIEW_ID_TAB_CONTAINER);
     }
-    content::WebContents* web_contents =
-        model.GetPreviewContents()->web_contents();
+    content::WebContents* web_contents = model.GetPreviewContents();
     contents_->SetPreview(preview_.get(), web_contents,
                           model.height(), model.height_units());
     preview_->SetWebContents(web_contents);
   } else if (preview_) {
     // Hide the preview. SetWebContents() must happen before SetPreview().
     preview_->SetWebContents(NULL);
     contents_->SetPreview(NULL, NULL, 100, INSTANT_SIZE_PERCENT);
     preview_.reset();
   }
 
   browser_->MaybeUpdateBookmarkBarStateForInstantPreview(model.mode());
 }