pdf: Create a separate component for using the pdf pepper plugin.

chrome/browser/ui/views/open_pdf_in_reader_bubble_view.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_OPEN_PDF_IN_READER_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_OPEN_PDF_IN_READER_BUBBLE_VIEW_H_
 
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
 
+namespace pdf {
 class OpenPDFInReaderPromptDelegate;
+}
 
 namespace views {
 class LabelButton;
 }
 
 class OpenPDFInReaderBubbleView : public views::BubbleDelegateView,
                                   public views::ButtonListener,
                                   public views::LinkListener {
  public:
   OpenPDFInReaderBubbleView(views::View* anchor_view,
-                            OpenPDFInReaderPromptDelegate* model);
+                            pdf::OpenPDFInReaderPromptDelegate* model);
   virtual ~OpenPDFInReaderBubbleView();
 
  protected:
   // views::BubbleDelegateView:
   virtual void Init() OVERRIDE;
 
   // views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   // views::LinkListener:
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
  private:
   // Weak pointer; owned by the PDFTabHelper of the currently active tab.
-  OpenPDFInReaderPromptDelegate* model_;
+  pdf::OpenPDFInReaderPromptDelegate* model_;
 
   views::Link* open_in_reader_link_;
   views::LabelButton* close_button_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenPDFInReaderBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_OPEN_PDF_IN_READER_BUBBLE_VIEW_H_