Remove dead code since PDFWebContentsHelper::ShowOpenInReaderPrompt isn't called anymore.

chrome/browser/ui/location_bar/location_bar.h

Index: chrome/browser/ui/location_bar/location_bar.h
diff --git a/chrome/browser/ui/location_bar/location_bar.h b/chrome/browser/ui/location_bar/location_bar.h
index ad2b220a02d83bcc8ab518459e0b3a92777a4e01..f566d39e8f42939c83f747a570989d3e2d1998fe 100644
--- a/chrome/browser/ui/location_bar/location_bar.h
+++ b/chrome/browser/ui/location_bar/location_bar.h
@@ -76,9 +76,6 @@ class LocationBar {
   virtual bool ShowPageActionPopup(const extensions::Extension* extension,
                                    bool grant_active_tab) = 0;
 
-  // Updates the state of the button to open a PDF in Adobe Reader.
-  virtual void UpdateOpenPDFInReaderPrompt() = 0;
-
   // Saves the state of the location bar to the specified WebContents, so that
   // it can be restored later. (Done when switching tabs).
   virtual void SaveStateToContents(content::WebContents* contents) = 0;