Verifies that mixed content issue is created from mixed content script.

Inspector issue: {
    issue : {
        code : MixedContentIssue
        details : {
            mixedContentIssueDetails : {
                frame : {
                    frameId : <string>
                }
                insecureURL : http://devtools.test:8000/inspector-protocol/resources/script.js
                mainResourceURL : https://devtools.test:8443/inspector-protocol/resources/mixed-content-js.html
                request : {
                    requestId : <string>
                    url : http://devtools.test:8000/inspector-protocol/resources/script.js
                }
                resolutionStatus : MixedContentBlocked
                resourceType : Script
            }
        }
    }
}
Inspector issue: {
    issue : {
        code : MixedContentIssue
        details : {
            mixedContentIssueDetails : {
                frame : {
                    frameId : <string>
                }
                insecureURL : http://devtools.test:8000/inspector-protocol/resources/script.js
                mainResourceURL : https://devtools.test:8443/inspector-protocol/resources/mixed-content-js.html
                request : {
                    requestId : <string>
                    url : http://devtools.test:8000/inspector-protocol/resources/script.js
                }
                resolutionStatus : MixedContentBlocked
                resourceType : Script
            }
        }
    }
}
requestIds and frameIds match: true