CSP: Upgrade SO navigational requests per spec.

netwerk/base/LoadInfo.cpp

@@ -859,6 +859,12 @@ LoadInfo::SetIsPreflight()
   mIsPreflight = true;
 }
 
+void
+LoadInfo::SetUpgradeInsecureRequests()
+{
+  mUpgradeInsecureRequests = true;
+}
+
 NS_IMETHODIMP
 LoadInfo::GetIsPreflight(bool* aIsPreflight)
 {

netwerk/base/LoadInfo.h

@@ -78,6 +78,7 @@ public:
   already_AddRefed<nsILoadInfo> CloneForNewRequest() const;
 
   void SetIsPreflight();
+  void SetUpgradeInsecureRequests();
 
 private:
   // private constructor that is only allowed to be called from within