Create the base Custom Context Menu Dialog.

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java
index 59821973cc6be63a55ab2d10d98b9448ea15456e..2768d3470ccf705239fad60a4ec7ee9f9a367bb6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuUi.java
@@ -26,7 +26,12 @@ public interface ContextMenuUi {
      * @param onItemClicked When the user has pressed an item the menuId associated with the item
      *                      is sent back through {@link Callback#onResult(Object)}. The ids that
      *                      could be called are in ids.xml.
+     * @param onMenuShown After the menu is displayed this method should be called to present a
+     *                    full menu.
+     * @param onMenuClosed When the menu is closed, this method is called to do any possible final
+     *                     clean up.
      */
     void displayMenu(Activity activity, ContextMenuParams params,
-            List<Pair<Integer, List<ContextMenuItem>>> items, Callback<Integer> onItemClicked);
+            List<Pair<Integer, List<ContextMenuItem>>> items, Callback<Integer> onItemClicked,
+            Runnable onMenuShown, Runnable onMenuClosed);
 }