fix: prevent navigator.fonts.query() from crashing (#30930)

* fix: prevent navigator.fonts.query() from crashing

* refactor: use base::PostTask instead

shell/browser/font/electron_font_access_delegate.cc

@@ -0,0 +1,42 @@
+// Copyright (c) 2021 Microsoft, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include <utility>
+
+#include "shell/browser/font/electron_font_access_delegate.h"
+
+#include "base/task/post_task.h"
+#include "chrome/browser/browser_process.h"
+#include "content/public/browser/browser_task_traits.h"
+#include "content/public/browser/font_access_chooser.h"
+#include "content/public/browser/render_frame_host.h"
+
+class ElectronFontAccessChooser : public content::FontAccessChooser {
+ public:
+  explicit ElectronFontAccessChooser(base::OnceClosure close_callback) {
+    base::PostTask(
+        FROM_HERE, {content::BrowserThread::UI},
+        base::BindOnce(
+            [](base::OnceClosure closure) { std::move(closure).Run(); },
+            std::move(close_callback)));
+  }
+  ~ElectronFontAccessChooser() override = default;
+};
+
+ElectronFontAccessDelegate::ElectronFontAccessDelegate() = default;
+ElectronFontAccessDelegate::~ElectronFontAccessDelegate() = default;
+
+std::unique_ptr<content::FontAccessChooser>
+ElectronFontAccessDelegate::RunChooser(
+    content::RenderFrameHost* frame,
+    const std::vector<std::string>& selection,
+    content::FontAccessChooser::Callback callback) {
+  // TODO(codebytere) : implement with proper permissions model.
+  return std::make_unique<ElectronFontAccessChooser>(base::BindOnce(
+      [](content::FontAccessChooser::Callback callback) {
+        std::move(callback).Run(
+            blink::mojom::FontEnumerationStatus::kUnimplemented, {});
+      },
+      std::move(callback)));
+}