Double check the permission before setting the Wake Lock

package android.webkit;

import android.Manifest.permission;

import android.content.pm.PackageManager;

import android.graphics.SurfaceTexture;

import android.media.MediaPlayer;

import android.webkit.HTML5VideoView;

    public void prepareDataAndDisplayMode(HTML5VideoViewProxy proxy) {

        super.prepareDataAndDisplayMode(proxy);

        setFrameAvailableListener(proxy);

        // TODO: This is a workaround, after b/5375681 fixed, we should switch

        // to the better way.

        if (mProxy.getContext().checkCallingOrSelfPermission(permission.WAKE_LOCK)

                == PackageManager.PERMISSION_GRANTED) {

            mPlayer.setWakeMode(proxy.getContext(), PowerManager.FULL_WAKE_LOCK);

        }

    }

    // Pause the play and update the play/pause button

    @Override