Handful of related instant changes:

chrome/browser/instant/instant_confirm_dialog.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_INSTANT_INSTANT_CONFIRM_DIALOG_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONFIRM_DIALOG_H_
 #pragma once
 
 #include "gfx/native_widget_types.h"
 
 class Profile;
 
 namespace browser {
 
 // URL for learning more about instant.
 extern const char kInstantLearnMoreURL[];
 
 // Invoked from the opt-in and preferences when the user toggles instant. If the
 // instant confirm dialog hasn't been shown, it's shown. If the instant dialog
 // has already been shown the dialog is not shown but the preference is toggled.
 void ShowInstantConfirmDialogIfNecessary(gfx::NativeWindow parent,
                                          Profile* profile);
 
 // Shows the platform specific dialog to confirm if the user really wants to
-// enable instant. If the user accepts the dialog implementations must set
-// both |prefs::kInstantEnabled| and |prefs::kInstantConfirmDialogShown| to
-// true.
+// enable instant. If the user accepts the dialog invoke
+// InstantController::Enable.
 void ShowInstantConfirmDialog(gfx::NativeWindow parent,
                               Profile* profile);
 
 }  // namespace browser
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONFIRM_DIALOG_H_