Bug 1800641 - Part 3: Add ScriptLoadRequest::SRIAndBytecode. r=nbp

Depends on D197840

Differential Revision: https://phabricator.services.mozilla.com/D197841

js/loader/ScriptLoadRequest.h

@@ -243,6 +243,14 @@ class ScriptLoadRequest
 
   void SetBytecode();
 
+  JS::TranscodeBuffer& SRIAndBytecode() {
+    // Note: SRIAndBytecode might be called even if the IsSource() returns true,
+    // as we want to be able to save the bytecode content when we are loading
+    // from source.
+    MOZ_ASSERT(IsBytecode() || IsSource());
+    return mScriptBytecode;
+  }
+
   JS::TranscodeRange Bytecode() const {
     MOZ_ASSERT(IsBytecode());
     const auto& bytecode = mScriptBytecode;