Handle a nullptr ExecutionContext in ConvertNodesIntoNode

Bug: 1085075
Change-Id: I0ffcd576cfec8545d466b2d24187e6d3be75160d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2209607
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Nate Chapin <japhet@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770844}

third_party/blink/renderer/core/dom/document.cc

@@ -4462,10 +4462,6 @@ void Document::writeln(v8::Isolate* isolate,
   writeln(string, EnteredDOMWindow(isolate)->document(), exception_state);
 }
 
-bool Document::IsTrustedTypesEnabledForDoc() const {
-  return GetExecutionContext()->RequireTrustedTypes();
-}
-
 void Document::write(v8::Isolate* isolate,
                      TrustedHTML* text,
                      ExceptionState& exception_state) {

third_party/blink/renderer/core/dom/document.h

@@ -766,7 +766,6 @@ class CORE_EXPORT Document : public ContainerNode,
   // TODO(mkwst): Write a spec for this.
   void write(v8::Isolate*, TrustedHTML*, ExceptionState&);
   void writeln(v8::Isolate*, TrustedHTML*, ExceptionState&);
-  bool IsTrustedTypesEnabledForDoc() const;
 
   bool WellFormed() const { return well_formed_; }
 

third_party/blink/renderer/core/dom/node.cc

@@ -840,8 +840,9 @@ static Node* ConvertNodesIntoNode(
     const HeapVector<NodeOrStringOrTrustedScript>& nodes,
     Document& document,
     ExceptionState& exception_state) {
-  bool needs_check =
-      IsA<HTMLScriptElement>(parent) && document.IsTrustedTypesEnabledForDoc();
+  bool needs_check = IsA<HTMLScriptElement>(parent) &&
+                     document.GetExecutionContext() &&
+                     document.GetExecutionContext()->RequireTrustedTypes();
 
   if (nodes.size() == 1)
     return NodeOrStringToNode(nodes[0], document, needs_check, exception_state);