Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/gtk/instant_preview_controller_gtk.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/gtk/instant_preview_controller_gtk.h"
-
-#include "chrome/browser/instant/instant_model.h"
-#include "chrome/browser/ui/gtk/browser_window_gtk.h"
-#include "chrome/browser/ui/gtk/tab_contents_container_gtk.h"
-
-InstantPreviewControllerGtk::InstantPreviewControllerGtk(
-    BrowserWindowGtk* window,
-    TabContentsContainerGtk* contents)
-    : InstantPreviewController(window->browser()),
-      window_(window),
-      contents_(contents) {
-}
-
-InstantPreviewControllerGtk::~InstantPreviewControllerGtk() {
-}
-
-void InstantPreviewControllerGtk::PreviewStateChanged(
-    const InstantModel& model) {
-  if (model.mode().is_search_suggestions()) {
-    // TODO(jered): Support non-100% height.
-    contents_->SetPreview(model.GetPreviewContents());
-  } else {
-    contents_->SetPreview(NULL);
-  }
-  window_->MaybeShowBookmarkBar(false);
-}