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This CL replaces blink::mojom::ResourceType with
network::mojom::RequestDestination in //content/browser/web_package
since blink::mojom::ResourceType is deprecated[1].

[1] https://crbug.com/960143

Bug: 1059639
Change-Id: Id0f360de51d22316afdc12190635adeade56752c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2637099Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Julie Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#845092}