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

chrome/browser/ui/views/location_bar/open_pdf_in_reader_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_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_
 
 #include "ui/views/controls/image_view.h"
 #include "ui/views/widget/widget_observer.h"
 
 class OpenPDFInReaderBubbleView;
-class OpenPDFInReaderPromptDelegate;
 
 namespace content {
 class WebContents;
 }
 
+namespace pdf {
+class OpenPDFInReaderPromptDelegate;
+}
+
 // A Page Action image view for the "Open PDF in Reader" bubble.
 class OpenPDFInReaderView : public views::ImageView,
                             public views::WidgetObserver {
  public:
   OpenPDFInReaderView();
   virtual ~OpenPDFInReaderView();
 
   void Update(content::WebContents* web_contents);
 
  private:
   void ShowBubble();
 
   // views::ImageView:
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
 
   // views::WidgetObserver:
   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
 
   OpenPDFInReaderBubbleView* bubble_;
 
   // Weak pointer; owned by the PDFTabHelper of the currently active tab.
-  OpenPDFInReaderPromptDelegate* model_;
+  pdf::OpenPDFInReaderPromptDelegate* model_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenPDFInReaderView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_