Add Manifest struct converters

This is a part of moving manifest implementation to blink and
the precursor patch before moving content::ManifestManager to
blink and will be used for RequestManifestCallback in
blink::ManifestManager to convert from blink::Manifest to

Bug: 704441
Change-Id: Iafb5d052f927d6200f7780c5d3537f2120b74ab7
Commit-Queue: Miyoung Shin <>
Reviewed-by: Dominick Ng <>
Cr-Commit-Position: refs/heads/master@{#653056}
3 files changed