Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 35db7f34ace6430ab7f7f8e0617cb5b7e4fd3d10..26463cfb7b5654d8f75b51e3377dd5e9808c1e61 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -456,8 +456,7 @@ class Browser : public TabStripModelObserver,
   // If necessary, update the bookmark bar state according to the Instant
   // overlay state: when Instant overlay shows suggestions and bookmark bar is
   // still showing attached, hide it.
-  void MaybeUpdateBookmarkBarStateForInstantOverlay(
-      const chrome::search::Mode& mode);
+  void MaybeUpdateBookmarkBarStateForInstantOverlay();
 
   // Show a download on the download shelf.
   void ShowDownload(content::DownloadItem* download);