Bug 1626404: Part 2b - Serialize source BC with LoadState. r=nika CLOSED TREE

Differential Revision: https://phabricator.services.mozilla.com/D69419

--HG--
extra : source : 2ffdab0072e7dbc56d232537aafbd2c1aa80ef14
extra : intermediate-source : ec63b18da4b9c1eb280f77a800e0e987aa3f20fa

docshell/base/nsDocShellLoadState.cpp

@@ -71,6 +71,7 @@ nsDocShellLoadState::nsDocShellLoadState(
   mReferrerInfo = aLoadState.ReferrerInfo();
   mURI = aLoadState.URI();
   mOriginalURI = aLoadState.OriginalURI();
+  mSourceBrowsingContext = aLoadState.SourceBrowsingContext();
   mBaseURI = aLoadState.BaseURI();
   mTriggeringPrincipal = aLoadState.TriggeringPrincipal();
   mPrincipalToInherit = aLoadState.PrincipalToInherit();
@@ -667,6 +668,7 @@ DocShellLoadStateInit nsDocShellLoadState::Serialize() {
       mIsFromProcessingFrameAttributes;
   loadState.URI() = mURI;
   loadState.OriginalURI() = mOriginalURI;
+  loadState.SourceBrowsingContext() = mSourceBrowsingContext;
   loadState.BaseURI() = mBaseURI;
   loadState.TriggeringPrincipal() = mTriggeringPrincipal;
   loadState.PrincipalToInherit() = mPrincipalToInherit;

dom/ipc/DOMTypes.ipdlh

@@ -266,6 +266,8 @@ struct DocShellLoadStateInit
   // encounters a server side redirect.
   nsIContentSecurityPolicy Csp;
 
+  MaybeDiscardedBrowsingContext SourceBrowsingContext;
+
   nsCString? OriginalURIString;
   int32_t? CancelContentJSEpoch;