Bug 1601773 - Make ReloadCurrentEntry forward to the child process if called from session history in the parent. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D56080

--HG--
extra : moz-landing-system : lando

docshell/shistory/PSHistory.ipdl

@@ -63,6 +63,9 @@ parent:
   async EvictContentViewersOrReplaceEntry(nullable PSHEntry newSHEntry, bool replace);
   async NotifyListenersContentViewerEvicted(uint32_t numEvicted);
   async __delete__();
+
+child:
+  async ReloadCurrentEntryFromChild();
 };
 
 } // namespace dom

docshell/shistory/SHistoryChild.h

@@ -40,6 +40,11 @@ class SHistoryChild final : public PSHistoryChild,
   }
 
  private:
+  bool RecvReloadCurrentEntryFromChild() {
+    ReloadCurrentEntry();
+    return true;
+  }
+
   // The timer based history tracker is used to evict bfcache on expiration.
   class HistoryTracker final
       : public nsExpirationTracker<SHEntryChildShared, 3> {

docshell/shistory/SHistoryParent.cpp

@@ -365,5 +365,11 @@ LegacySHistory::CreateEntry(nsISHEntry** aEntry) {
   return NS_OK;
 }
 
+NS_IMETHODIMP
+LegacySHistory::ReloadCurrentEntry() {
+  return mSHistoryParent->SendReloadCurrentEntryFromChild() ? NS_OK
+                                                            : NS_ERROR_FAILURE;
+}
+
 }  // namespace dom
 }  // namespace mozilla

docshell/shistory/SHistoryParent.h

@@ -37,6 +37,8 @@ class LegacySHistory final : public nsSHistory {
                  CanonicalBrowsingContext* aRootBC, const nsID& aDocShellID);
 
   NS_IMETHOD CreateEntry(nsISHEntry** aEntry) override;
+  using nsSHistory::ReloadCurrentEntry;
+  NS_IMETHOD ReloadCurrentEntry() override;
 
   SHistoryParent* GetActor() { return mSHistoryParent; }
 };