Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/gtk/browser_window_gtk.cc

Index: chrome/browser/ui/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.cc b/chrome/browser/ui/gtk/browser_window_gtk.cc
index d120d84776afcb15492cf824f3b87bac6ba00e8b..63c6941a313648557abd722c87ff6545a43cf915 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_window_gtk.cc
@@ -64,7 +64,7 @@
 #include "chrome/browser/ui/gtk/gtk_window_util.h"
 #include "chrome/browser/ui/gtk/infobars/infobar_container_gtk.h"
 #include "chrome/browser/ui/gtk/infobars/infobar_gtk.h"
-#include "chrome/browser/ui/gtk/instant_preview_controller_gtk.h"
+#include "chrome/browser/ui/gtk/instant_overlay_controller_gtk.h"
 #include "chrome/browser/ui/gtk/location_bar_view_gtk.h"
 #include "chrome/browser/ui/gtk/nine_box.h"
 #include "chrome/browser/ui/gtk/one_click_signin_bubble_gtk.h"
@@ -1664,8 +1664,8 @@ void BrowserWindowGtk::InitWidgets() {
   gtk_box_pack_end(GTK_BOX(window_vbox_), render_area_event_box_,
                    TRUE, TRUE, 0);
 
-  instant_preview_controller_.reset(
-      new InstantPreviewControllerGtk(this, contents_container_.get()));
+  instant_overlay_controller_.reset(
+      new InstantOverlayControllerGtk(this, contents_container_.get()));
 
   if (IsBookmarkBarSupported()) {
     bookmark_bar_.reset(new BookmarkBarGtk(this,
@@ -1909,7 +1909,7 @@ void BrowserWindowGtk::MaybeShowBookmarkBar(bool animate) {
     bookmark_bar_->SetPageNavigator(browser_.get());
 
   BookmarkBar::State state = browser_->bookmark_bar_state();
-  if (contents_container_->HasPreview() && state == BookmarkBar::DETACHED)
+  if (contents_container_->HasOverlay() && state == BookmarkBar::DETACHED)
     state = BookmarkBar::HIDDEN;
 
   toolbar_->UpdateForBookmarkBarVisibility(state == BookmarkBar::DETACHED);