Refused to execute inline event handler because it violates the following Content Security Policy directive: "xxx". Either the 'unsafe-inline' keyword, a hash ('sha256-...'), or a nonce ('nonce-...')

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* Refused to execute inline event handler because it violates the following Content Security Policy directive: "xxx". Either the 'unsafe-inline' keyword, a hash ('sha256-...'), or a nonce ('nonce-...') is required to enable inline execution.
 * 说明：
 *     主要是没想到Chrome扩展的HTML中不能添加事件，只能在JS中动态添加。
 *
 *                                              2018-4-10 深圳 宝安西乡 曾剑锋
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