Add a mechanism for users to opt-out of CSP & XSS violations reports.

Source/core/html/parser/XSSAuditorDelegate.cpp

Index: Source/core/html/parser/XSSAuditorDelegate.cpp
diff --git a/Source/core/html/parser/XSSAuditorDelegate.cpp b/Source/core/html/parser/XSSAuditorDelegate.cpp
index b13435db3fa1ec9b0dd144df6341095628655c93..6ca498a9ca1b4d8ef9835ba2018297218987c43d 100644
--- a/Source/core/html/parser/XSSAuditorDelegate.cpp
+++ b/Source/core/html/parser/XSSAuditorDelegate.cpp
@@ -28,6 +28,7 @@
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/Settings.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
@@ -117,7 +118,7 @@ void XSSAuditorDelegate::didBlockScript(const XSSInfo& xssInfo)
 
         frameLoader.client()->didDetectXSS(m_document->url(), xssInfo.m_didBlockEntirePage);
 
-        if (!m_reportURL.isEmpty())
+        if (!m_reportURL.isEmpty() && !m_document->settings()->xssViolationReportsUploadOptOut())
             PingLoader::sendViolationReport(m_document->frame(), m_reportURL, generateViolationReport(xssInfo), PingLoader::XSSAuditorViolationReport);
     }