[ios] Rename LRUCache to SnapshotLRUCache.

Avoid a namespace conflict with the CFNetwork framework.

Change-Id: If596cfb14d118fc7bc08bf2ae732c6e347ab049e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1724835
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Auto-Submit: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682450}
5 files changed