Windows: Add an "Open in Adobe Reader" menu item for PDF files in the download shelf.

chrome/browser/download/download_shelf_context_menu.h

Index: chrome/browser/download/download_shelf_context_menu.h
diff --git a/chrome/browser/download/download_shelf_context_menu.h b/chrome/browser/download/download_shelf_context_menu.h
index 15b6504c7807cd63035ceca7b1ef4d7cfc9c8b6f..a5d8a5eb32ac0a8b4879243a57ffe4d4ebcc92e2 100644
--- a/chrome/browser/download/download_shelf_context_menu.h
+++ b/chrome/browser/download/download_shelf_context_menu.h
@@ -52,6 +52,7 @@ class DownloadShelfContextMenu : public ui::SimpleMenuModel::Delegate,
   // ui::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdVisible(int command_id) const OVERRIDE;
   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
@@ -73,6 +74,13 @@ class DownloadShelfContextMenu : public ui::SimpleMenuModel::Delegate,
   ui::SimpleMenuModel* GetMaybeMaliciousMenuModel();
   ui::SimpleMenuModel* GetMaliciousMenuModel();
 
+  int GetAlwaysOpenStringId() const;
+
+#if defined(OS_WIN)
+  bool IsDownloadPdf() const;
+  bool CanOpenPdfInReader() const;
+#endif
+
   // We show slightly different menus if the download is in progress vs. if the
   // download has finished.
   scoped_ptr<ui::SimpleMenuModel> in_progress_download_menu_model_;
@@ -87,6 +95,10 @@ class DownloadShelfContextMenu : public ui::SimpleMenuModel::Delegate,
   // Used to open tabs.
   content::PageNavigator* navigator_;
 
+#if defined(OS_WIN)
+  bool is_pdf_reader_up_to_date_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(DownloadShelfContextMenu);
 };