Fixes bug in instant where we would end up incorrectly using the

chrome/browser/ui/gtk/browser_window_gtk.cc

 // Copyright (c) 2011 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/browser_window_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include <dlfcn.h>
 #include <string>
@@ skipping 1136 matching lines @@
 
 void BrowserWindowGtk::Paste() {
   gtk_util::DoPaste(this);
 }
 
 void BrowserWindowGtk::ShowInstant(TabContentsWrapper* preview) {
   contents_container_->SetPreview(preview);
   MaybeShowBookmarkBar(false);
 }
 
-void BrowserWindowGtk::HideInstant(bool instant_is_active) {
+void BrowserWindowGtk::HideInstant() {
   contents_container_->PopPreview();
   MaybeShowBookmarkBar(false);
 }
 
 gfx::Rect BrowserWindowGtk::GetInstantBounds() {
   return gtk_util::GetWidgetScreenBounds(contents_container_->widget());
 }
 
 WindowOpenDisposition BrowserWindowGtk::GetDispositionForPopupBounds(
     const gfx::Rect& bounds) {
@@ skipping 1220 matching lines @@
           wm_name == "Openbox" ||
           wm_name == "Xfwm4");
 }
 
 // static
 BrowserWindow* BrowserWindow::CreateBrowserWindow(Browser* browser) {
   BrowserWindowGtk* browser_window_gtk = new BrowserWindowGtk(browser);
   browser_window_gtk->Init();
   return browser_window_gtk;
 }