Android Webview remote code execution getClassLoader-vulnerability warning-the black bar safety net

It is well known in the Android 4.4 system on Google has been the default system Webkit kernel is replaced with the own open-source project chromium,and in Issue 2 1 3 6 9 3 0 0 5（https://codereview.chromium.org/213693005）shielding the webview object. getClass, android in 4. 4. 4 version complete...