CSP: Adding the 'upgrade-insecure-requests' directive.

Source/core/frame/csp/CSPDirectiveList.h

Index: Source/core/frame/csp/CSPDirectiveList.h
diff --git a/Source/core/frame/csp/CSPDirectiveList.h b/Source/core/frame/csp/CSPDirectiveList.h
index 7efb22e7d9d8f5af53a1471efa614b5f0a3573dc..01807ea377d1d3616a8d371a0cd34baa15765b3c 100644
--- a/Source/core/frame/csp/CSPDirectiveList.h
+++ b/Source/core/frame/csp/CSPDirectiveList.h
@@ -75,6 +75,7 @@ private:
     void addDirective(const String& name, const String& value);
     void applySandboxPolicy(const String& name, const String& sandboxPolicy);
     void enforceStrictMixedContentChecking(const String& name, const String& value);
+    void enableInsecureContentUpgrade(const String& name, const String& value);
 
     template <class CSPDirectiveType>
     void setCSPDirective(const String& name, const String& value, OwnPtr<CSPDirectiveType>&);
@@ -120,6 +121,8 @@ private:
 
     bool m_strictMixedContentCheckingEnforced;
 
+    bool m_upgradeInsecureRequests;
+
     OwnPtr<MediaListDirective> m_pluginTypes;
     OwnPtr<SourceListDirective> m_baseURI;
     OwnPtr<SourceListDirective> m_childSrc;