Revert of MacViews: add extension install dialog to MacViewsWebUIDialogs

chrome/browser/extensions/extension_install_prompt.h

Index: chrome/browser/extensions/extension_install_prompt.h
diff --git a/chrome/browser/extensions/extension_install_prompt.h b/chrome/browser/extensions/extension_install_prompt.h
index f71eb801d67c260d461b42650930b234eb3bc624..13ee5bf851578b2fcb961c50c217e3a1eea6cc16 100644
--- a/chrome/browser/extensions/extension_install_prompt.h
+++ b/chrome/browser/extensions/extension_install_prompt.h
@@ -259,13 +259,6 @@
   // Callback to show the default extension install dialog.
   // The implementations of this function are platform-specific.
   static ShowDialogCallback GetDefaultShowDialogCallback();
-
-  // Callback to show the Views extension install dialog. Don't use this; it is
-  // a temporary hack for MacViews.
-  // TODO(ellyjones): Remove this.
-#if defined(OS_MACOSX)
-  static ShowDialogCallback GetViewsShowDialogCallback();
-#endif
 
   // Returns the appropriate prompt type for the given |extension|.
   // TODO(devlin): This method is yucky - callers probably only care about one