Fix print preview dialog for <webview>.

chrome/browser/ui/views/constrained_window_views.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_CONSTRAINED_WINDOW_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_CONSTRAINED_WINDOW_VIEWS_H_
 
 #include "ui/gfx/native_widget_types.h"
 
 namespace content {
@@ skipping 15 matching lines @@
 // reposition widgets e.g. when the host dimensions change.
 void UpdateWebContentsModalDialogPosition(
     views::Widget* widget,
     web_modal::WebContentsModalDialogHost* dialog_host);
 
 void UpdateBrowserModalDialogPosition(
     views::Widget* widget,
     web_modal::ModalDialogHost* dialog_host);
 
 // Calls CreateWebModalDialogViews, shows the dialog, and returns its widget.
-views::Widget* ShowWebModalDialogViews(views::WidgetDelegate* dialog,
-                                       content::WebContents* web_contents);
+views::Widget* ShowWebModalDialogViews(
+    views::WidgetDelegate* dialog,
+    content::WebContents* initiator_web_contents);
 
 // Create a widget for |dialog| that is modal to |web_contents|.
 views::Widget* CreateWebModalDialogViews(views::WidgetDelegate* dialog,
                                          content::WebContents* web_contents);
 
 // Create a widget for |dialog| that is modal to the browser window |parent|.
 // This places the dialog appropriately if |parent| is a valid browser window.
 views::Widget* CreateBrowserModalDialogViews(views::DialogDelegate* dialog,
                                              gfx::NativeWindow parent);
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CONSTRAINED_WINDOW_VIEWS_H_