fix: crash calling BrowserWindow.removeBrowserView() with destroyed webContents (#38842)

fix: crash calling removeBrowserView() with destroyed webContents

https://github.com/electron/electron/issues/37642

shell/browser/api/electron_api_browser_view.cc

@@ -131,6 +131,10 @@ void BrowserView::WebContentsDestroyed() {
   Unpin();
 }
 
+void BrowserView::OnCloseContents() {
+  api_web_contents_ = nullptr;
+}
+
 // static
 gin::Handle<BrowserView> BrowserView::New(gin_helper::ErrorThrower thrower,
                                           gin::Arguments* args) {

shell/browser/api/electron_api_browser_view.h

@@ -71,6 +71,9 @@ class BrowserView : public gin::Wrappable<BrowserView>,
   // content::WebContentsObserver:
   void WebContentsDestroyed() override;
 
+  // ExtendedWebContentsObserver:
+  void OnCloseContents() override;
+
  private:
   void SetAutoResize(AutoResizeFlags flags);
   void SetBounds(const gfx::Rect& bounds);