IsCrossOriginToMainFrame renamed due to MPArch

Chromium change:
https://chromium.googlesource.com/chromium/src/+/6eb75d3c7b9ef4f90d7ee13471e0aac9f820967b

commit 6eb75d3c7b9ef4f90d7ee13471e0aac9f820967b
Author: Ian Vollick <vollick@chromium.org>
Date:   Fri Apr 22 21:44:59 2022 +0000

    [mparch] Add and start using Frame::IsCrossOriginToOutermostMainFrame

    With MPArch we can have a nested main frame, so for cases when we want
    to check that an embedded frame is cross-origin with respect to the
    outermost main frame, we should use IsCrossOriginToOutermostMainFrame.
    This CL changes a number of cases where the semantics appear to match
    outermost.

    This should have no effect outside the use of MPArch-based nested frame
    trees (only fenced frames at the moment).

    However, this is an interim step: the vast majority of current
    IsCrossOriginToMainFrame usages should be comparing with the outermost
    main frame, not the nearest. Ultimately, we will rename
    IsCrossOriginToMainFrame -> IsCrossOriginToNearestMainFrame, which will
    be used rarely, with all other instances using the 'outermost' check. A
    TODO has been added over IsCrossOriginToMainFrame about this next step.

    TODOs have been added for test coverage of these changes, similar to the
    approach taken in crrev.com/c/2988476 and crrev.com/c/3577677.

    More will be added after the mass rename in the sebsequent CL.

    Bug: 1318055

renderer/brave_wallet/brave_wallet_render_frame_observer.cc

@@ -47,7 +47,7 @@ void BraveWalletRenderFrameObserver::DidCreateScriptContext(
   }
   // Wallet provider objects won't be generated for third party iframe
   if (!render_frame()->IsMainFrame() &&
-      render_frame()->GetWebFrame()->IsCrossOriginToMainFrame()) {
+      render_frame()->GetWebFrame()->IsCrossOriginToOutermostMainFrame()) {
     return;
   }