WebKitTestRunner's hasDocumentElement should return false if there is…

… no JS context

https://bugs.webkit.org/show_bug.cgi?id=267483
rdar://120933913

Reviewed by Charlie Wolfe.

A RemoteFrame has no JS context because the JS context is in another process.
This little change fixes a crash in layout tests with --site-isolation

* LayoutTests/platform/mac-site-isolation/TestExpectations:
* Tools/WebKitTestRunner/InjectedBundle/InjectedBundlePage.cpp:
(WTR::hasDocumentElement):

Canonical link: https://commits.webkit.org/273009@main

LayoutTests/platform/mac-site-isolation/TestExpectations

@@ -126,7 +126,6 @@ http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-ne
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-cross-star-allow.html [ Skip ]
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-cross-url-allow.html [ Skip ]
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-cross-url-block.html [ Skip ]
-http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-same-none-block.html [ Skip ]
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-same-self-block.html [ Skip ]
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-same-star-allow.html [ Skip ]
 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-same-url-allow.html [ Skip ]
@@ -623,3 +622,4 @@ http/wpt/webrtc/audiovideo-script-transform.html [ ImageOnlyFailure Failure ]
 http/wpt/webrtc/third-party-frame-ice-candidate-filtering.html [ ImageOnlyFailure Failure ]
 http/wpt/webrtc/video-script-transform-simulcast.html [ ImageOnlyFailure Failure ]
 http/wpt/webrtc/video-script-transform.html [ ImageOnlyFailure Failure ]
+http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-cross-in-same-none-block.html [ ImageOnlyFailure Failure ]

Tools/WebKitTestRunner/InjectedBundle/InjectedBundlePage.cpp

@@ -696,6 +696,8 @@ void InjectedBundlePage::dumpAllFrameScrollPositions(StringBuilder& stringBuilde
 static bool hasDocumentElement(WKBundleFrameRef frame)
 {
     auto context = WKBundleFrameGetJavaScriptContext(frame);
+    if (!context)
+        return false;
     return objectProperty(context, JSContextGetGlobalObject(context), { "document", "documentElement" });
 }