GitLab

Gin-based QueryableDataBindings is deprecated in favor of using
HTML5 MessageChannel based bindings.

Major changes:
- feature::kUseQueryableDataBackend is removed
- QueryableDataHostCast is removed
- QueryableDataBindings is removed

Merge-With: eureka-internal/452219

Bug: Internal b/141323597
Test: None; New binding is stable on production.
Change-Id: I2cab76239bbecceda492265d7d036ce1ebdef654
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412781Reviewed-by: Sean Topping <seantopping@chromium.org>
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Commit-Queue: Jiawei Li <lijiawei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809073}