CSP: Don't override the location set in reportViolationWithLocation.

third_party/WebKit/LayoutTests/http/tests/security/contentSecurityPolicy/report-uri-from-child-frame-expected.txt

 CONSOLE ERROR: line 1: Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'self'". Either the 'unsafe-inline' keyword, a hash ('sha256-2jEXxWe/uIoRJGbfoW7Bd11qhRclP9IuS5ZXCbhCUnM='), or a nonce ('nonce-...') is required to enable inline execution.
 
 PingLoader dispatched to 'http://127.0.0.1:8000/security/contentSecurityPolicy/resources/save-report.php?test=generate-csp-report.php'.
 
 
 --------
 Frame: '<!--framePath //<!--frame0-->-->'
 --------
 CSP report received:
 CONTENT_TYPE: application/csp-report
 HTTP_REFERER: http://127.0.0.1:8000/security/contentSecurityPolicy/resources/generate-csp-report.php
 REQUEST_METHOD: POST
 === POST DATA ===
-{"csp-report":{"document-uri":"http://127.0.0.1:8000/security/contentSecurityPolicy/resources/generate-csp-report.php","referrer":"http://127.0.0.1:8000/security/contentSecurityPolicy/report-uri-from-child-frame.html","violated-directive":"script-src","effective-directive":"script-src","original-policy":"script-src 'self'; report-uri save-report.php?test=generate-csp-report.php","disposition":"enforce","blocked-uri":"inline","line-number":1,"status-code":200}}
+{"csp-report":{"document-uri":"http://127.0.0.1:8000/security/contentSecurityPolicy/resources/generate-csp-report.php","referrer":"http://127.0.0.1:8000/security/contentSecurityPolicy/report-uri-from-child-frame.html","violated-directive":"script-src","effective-directive":"script-src","original-policy":"script-src 'self'; report-uri save-report.php?test=generate-csp-report.php","disposition":"enforce","blocked-uri":"inline","line-number":1,"source-file":"http://127.0.0.1:8000/security/contentSecurityPolicy/resources/generate-csp-report.php","status-code":200}}