Chromium change: https://chromium-review.googlesource.com/c/chromium/src/+/3246335 feed-modularization: Clean up after FeedHooks migration Simplify some things now that FeedHooks can be used to create the ProcessScope. I wanted to get rid of the initialization at startup in FeedSurfaceTracker / FeedServiceBridge because timing of the call can be error prone. The Feed component currently needs a ProcessScope when it prefetches images, and this shouldn't be tied to initialization of any UI. To do that, I used Java reflection. Bug: 1254437, 1274816