Bug 1843239, [Cached] Location.hash, r=peterv

Differential Revision: https://phabricator.services.mozilla.com/D183788

docshell/base/nsDocShell.h

@@ -1160,7 +1160,10 @@ class nsDocShell final : public nsDocLoader,
                                const nsAString& aTitle, bool aReplace,
                                nsIURI* aCurrentURI, bool aEqualURIs);
 
- private:  // data members
+ private:
+  void SetCurrentURIInternal(nsIURI* aURI);
+
+  // data members
   nsString mTitle;
   nsCString mOriginalUriString;
   nsTObserverArray<nsWeakPtr> mPrivacyObservers;
@@ -1205,6 +1208,7 @@ class nsDocShell final : public nsDocLoader,
   mozilla::UniquePtr<mozilla::ObservedDocShell> mObserved;
 
   // mCurrentURI should be marked immutable on set if possible.
+  // Change mCurrentURI only through SetCurrentURIInternal method.
   nsCOMPtr<nsIURI> mCurrentURI;
   nsCOMPtr<nsIReferrerInfo> mReferrerInfo;