Cleanup AppMenu code.

chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java

Index: chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java
index db801f3e177bf754b14428fc68057953c00e08a6..c133bc38c8989435bc0bd78330058520c59b25be 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuObserver.java
@@ -4,30 +4,13 @@
 
 package org.chromium.chrome.browser.appmenu;
 
-import com.google.common.annotations.VisibleForTesting;
-
 /**
  * Allows monitoring of application menu actions.
  */
 public interface AppMenuObserver {
     /**
      * Informs when the App Menu visibility changes.
-     * @param newState Whether the menu is now visible.
-     * @param focusedPosition The position that is currently in focus.
-     */
-    public void onMenuVisibilityChanged(boolean newState, int focusedPosition);
-
-    /**
-     * Notifies that the keyboard focus has changed within the App Menu.
-     * @param focusedPosition The position that is currently in focus.
-     */
-    @VisibleForTesting
-    public void onKeyboardFocusChanged(int focusedPosition);
-
-    /**
-     * Notifies that the keyboard has activated an item in the App Menu.
-     * @param focusedPosition The position of the item that was activated.
+     * @param isVisible Whether the menu is now visible.
      */
-    @VisibleForTesting
-    public void onKeyboardActivatedItem(int focusedPosition);
+    public void onMenuVisibilityChanged(boolean isVisible);
 }