Use ContentViewCore's container view to keep screen on

ui/android/java/src/org/chromium/ui/WindowAndroid.java

 // Copyright (c) 2012 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.ui;
 
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.SparseArray;
-import android.view.WindowManager;
 import android.widget.Toast;
 
 import java.util.HashMap;
 
 import org.chromium.base.JNINamespace;
 
 /**
  * The window base class that has the minimum functionality.
  */
 @JNINamespace("ui")
@@ skipping 168 matching lines @@
      * the object has not been previously initialized.
      * @return A pointer to the c++ AndroidWindow.
      */
     public int getNativePointer() {
         if (mNativeWindowAndroid == 0) {
             mNativeWindowAndroid = nativeInit();
         }
         return mNativeWindowAndroid;
     }
 
-    public void keepScreenOn(boolean screenOn) {
-        if (screenOn) {
-            mActivity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-        } else {
-            mActivity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-        }
-    }
-
     private native int nativeInit();
     private native void nativeDestroy(int nativeWindowAndroid);
 
 }