Rename tabBase to tab

chrome/android/java/src/org/chromium/chrome/browser/EmptyTabObserver.java

 // Copyright 2013 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;
 
 import android.view.ContextMenu;
 
 /**
  * An implementation of the {@link TabObserver} which has empty implementations of all methods.
@@ skipping 24 matching lines @@
     @Override
     public void onWebContentsSwapped(Tab tab, boolean didStartLoad, boolean didFinishLoad) { }
 
     @Override
     public void onContextMenuShown(Tab tab, ContextMenu menu) { }
 
     @Override
     public void onWebContentsInstantSupportDisabled() { }
 
     @Override
-    public void onLoadStarted(Tab tabBase) { }
+    public void onLoadStarted(Tab tab) { }
 
     @Override
-    public void onLoadStopped(Tab tabBase) { }
+    public void onLoadStopped(Tab tab) { }
 
     @Override
     public void onLoadProgressChanged(Tab tab, int progress) { }
 
     @Override
     public void onUpdateUrl(Tab tab, String url) { }
 
     @Override
     public void onToggleFullscreenMode(Tab tab, boolean enable) { }
 
     @Override
     public void onDidFailLoad(Tab tab, boolean isProvisionalLoad, boolean isMainFrame,
             int errorCode, String description, String failingUrl) { }
 
     @Override
     public void onDidStartProvisionalLoadForFrame(Tab tab, long frameId, long parentFrameId,
             boolean isMainFrame, String validatedUrl, boolean isErrorPage,
             boolean isIframeSrcdoc) { }
 
     @Override
     public void onDidChangeThemeColor(int color) { }
 }