Clean up ReaderMode OverlayPanel classes

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanel.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.compositor.bottombar;
 
 import android.app.Activity;
 import android.content.Context;
 import android.graphics.RectF;
 
@@ skipping 36 matching lines @@
         // TODO(pedrosimonetti): consider removing the UNDEFINED state
         UNDEFINED,
         CLOSED,
         PEEKED,
         EXPANDED,
         MAXIMIZED
     }
 
     /**
      * The reason for a change in the Overlay Panel's state.
-     * TODO(mdjones): Separate generic reasons from Contextual Search reasons.
      */
     public enum StateChangeReason {
         UNKNOWN,
         RESET,
         BACK_PRESS,
         TEXT_SELECT_TAP,
         TEXT_SELECT_LONG_PRESS,
         INVALID_SELECTION,
         CLEARED_SELECTION,
         BASE_PAGE_TAP,
         BASE_PAGE_SCROLL,
         SEARCH_BAR_TAP,
         SERP_NAVIGATION,
         TAB_PROMOTION,
         CLICK,
         SWIPE,
         FLING,
         OPTIN,
         OPTOUT,
         CLOSE_BUTTON,
         SUPPRESS,
-        UNSUPPRESS,
-        FULLSCREEN_ENTERED,
-        FULLSCREEN_EXITED,
-        INFOBAR_SHOWN,
-        INFOBAR_HIDDEN,
-        CONTENT_CHANGED,
-        KEYBOARD_SHOWN,
-        KEYBOARD_HIDDEN,
-        TAB_NAVIGATION
+        UNSUPPRESS
     }
 
     /** The activity this panel is in. */
     protected ChromeActivity mActivity;
 
     /** The initial height of the Overlay Panel. */
     private float mInitialPanelHeight;
 
     /** The initial location of a touch on the panel */
     private float mInitialPanelTouchY;
@@ skipping 792 matching lines @@
 
     @Override
     public void tabPageLoadFinished(int id, boolean incognito) {}
 
     @Override
     public void tabLoadStarted(int id, boolean incognito) {}
 
     @Override
     public void tabLoadFinished(int id, boolean incognito) {}
 }