Bug 1658924: Implement HTTPS-First and automatically fall back to http if secure top-level connection is not available r=necko-reviewers,JulianWels,mattwoodrow,dragana

Differential Revision: https://phabricator.services.mozilla.com/D111686

docshell/base/nsDocShellLoadState.h

@@ -131,6 +131,10 @@ class nsDocShellLoadState final {
 
   void SetForceAllowDataURI(bool aForceAllowDataURI);
 
+  bool IsExemptFromHTTPSOnlyMode() const;
+
+  void SetIsExemptFromHTTPSOnlyMode(bool aIsExemptFromHTTPSOnlyMode);
+
   bool OriginalFrameSrc() const;
 
   void SetOriginalFrameSrc(bool aOriginalFrameSrc);
@@ -404,6 +408,10 @@ class nsDocShellLoadState final {
   // to a data URI will be allowed.
   bool mForceAllowDataURI;
 
+  // If this attribute is true, then the top-level navigaion
+  // will be exempt from HTTPS-Only-Mode upgrades.
+  bool mIsExemptFromHTTPSOnlyMode;
+
   // If this attribute is true, this load corresponds to a frame
   // element loading its original src (or srcdoc) attribute.
   bool mOriginalFrameSrc;