Move the web dialogs code to src/ui/web_dialogs from src/chrome

chrome/browser/ui/webui/print_preview/print_preview_ui.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_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/time.h"
 #include "chrome/browser/printing/print_preview_data_service.h"
-#include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
+#include "ui/web_dialogs/constrained_web_dialog_ui.h"
 
 class PrintPreviewDataService;
 class PrintPreviewHandler;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 
 namespace base {
 class RefCountedBytes;
 }
 
 namespace gfx {
 class Rect;
 }
 
 namespace printing {
 struct PageSizeMargins;
 }
 
-class PrintPreviewUI : public ConstrainedWebDialogUI {
+class PrintPreviewUI : public ui::ConstrainedWebDialogUI {
  public:
   explicit PrintPreviewUI(content::WebUI* web_ui);
   virtual ~PrintPreviewUI();
 
   // Gets the print preview |data|. |index| is zero-based, and can be
   // |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to get the entire preview
   // document.
   void GetPrintPreviewDataForIndex(int index,
                                    scoped_refptr<base::RefCountedBytes>* data);
 
@@ skipping 135 matching lines @@
   // title.
   string16 initiator_tab_title_;
 
   // Keeps track of whether OnClosePrintPreviewTab() has been called or not.
   bool tab_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_